<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.ghco.com/role/AccountsReceivableAccountsPayableAndAccruedLiabilities" xlink:href="ghc-20171231.xsd#AccountsReceivableAccountsPayableAndAccruedLiabilities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AccountsReceivableAccountsPayableAndAccruedLiabilitiesDetails1" xlink:href="ghc-20171231.xsd#AccountsReceivableAccountsPayableAndAccruedLiabilitiesDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AccountsReceivableAccountsPayableAndAccruedLiabilitiesNarrativeDetails" xlink:href="ghc-20171231.xsd#AccountsReceivableAccountsPayableAndAccruedLiabilitiesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AccountsReceivableAccountsPayableAndAccruedLiabilitiesTables" xlink:href="ghc-20171231.xsd#AccountsReceivableAccountsPayableAndAccruedLiabilitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:href="ghc-20171231.xsd#AccumulatedOtherComprehensiveIncomeLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLossAociBalancesDetails2" xlink:href="ghc-20171231.xsd#AccumulatedOtherComprehensiveIncomeLossAociBalancesDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsOfOciDetails1" xlink:href="ghc-20171231.xsd#AccumulatedOtherComprehensiveIncomeLossComponentsOfOciDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLossReclassificationsOutOfAociDetails3" xlink:href="ghc-20171231.xsd#AccumulatedOtherComprehensiveIncomeLossReclassificationsOutOfAociDetails3" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:href="ghc-20171231.xsd#AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinesses" xlink:href="ghc-20171231.xsd#AcquisitionsAndDispositionsOfBusinesses" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesAcquiredAssetsAndLiabilitiesAssumedDetails1" xlink:href="ghc-20171231.xsd#AcquisitionsAndDispositionsOfBusinessesAcquiredAssetsAndLiabilitiesAssumedDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesNarrativeDetails" xlink:href="ghc-20171231.xsd#AcquisitionsAndDispositionsOfBusinessesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesProFormaFinancialsDetails2" xlink:href="ghc-20171231.xsd#AcquisitionsAndDispositionsOfBusinessesProFormaFinancialsDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesSignificantComponentDetails3" xlink:href="ghc-20171231.xsd#AcquisitionsAndDispositionsOfBusinessesSignificantComponentDetails3" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesTables" xlink:href="ghc-20171231.xsd#AcquisitionsAndDispositionsOfBusinessesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/BusinessSegments" xlink:href="ghc-20171231.xsd#BusinessSegments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/BusinessSegmentsInformationByOperatingSegmentDetails2" xlink:href="ghc-20171231.xsd#BusinessSegmentsInformationByOperatingSegmentDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/BusinessSegmentsNarrativeDetails" xlink:href="ghc-20171231.xsd#BusinessSegmentsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/BusinessSegmentsRestructuringCostsDetails1" xlink:href="ghc-20171231.xsd#BusinessSegmentsRestructuringCostsDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/BusinessSegmentsTables" xlink:href="ghc-20171231.xsd#BusinessSegmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptions" xlink:href="ghc-20171231.xsd#CapitalStockStockAwardsAndStockOptions" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsAntidilutiveSharesDetails6" xlink:href="ghc-20171231.xsd#CapitalStockStockAwardsAndStockOptionsAntidilutiveSharesDetails6" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsEarningsPerShareDetails5" xlink:href="ghc-20171231.xsd#CapitalStockStockAwardsAndStockOptionsEarningsPerShareDetails5" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsFairValueAssumptionsDetails4" xlink:href="ghc-20171231.xsd#CapitalStockStockAwardsAndStockOptionsFairValueAssumptionsDetails4" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsNarrativeDetails" xlink:href="ghc-20171231.xsd#CapitalStockStockAwardsAndStockOptionsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsOptionsOutstandingAndExercisableDetails3" xlink:href="ghc-20171231.xsd#CapitalStockStockAwardsAndStockOptionsOptionsOutstandingAndExercisableDetails3" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsStockAwardsRollforwardDetails1" xlink:href="ghc-20171231.xsd#CapitalStockStockAwardsAndStockOptionsStockAwardsRollforwardDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsStockOptionsRollforwardDetails2" xlink:href="ghc-20171231.xsd#CapitalStockStockAwardsAndStockOptionsStockOptionsRollforwardDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsTables" xlink:href="ghc-20171231.xsd#CapitalStockStockAwardsAndStockOptionsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/ConsolidatedBalanceSheets" xlink:href="ghc-20171231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/ConsolidatedBalanceSheetsParentheticals" xlink:href="ghc-20171231.xsd#ConsolidatedBalanceSheetsParentheticals" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="ghc-20171231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/ConsolidatedStatementsOfChangesInCommonShareholdersEquity" xlink:href="ghc-20171231.xsd#ConsolidatedStatementsOfChangesInCommonShareholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="ghc-20171231.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/ConsolidatedStatementsOfOperations" xlink:href="ghc-20171231.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/Contingencies" xlink:href="ghc-20171231.xsd#Contingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/ContingenciesDetails" xlink:href="ghc-20171231.xsd#ContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/Debt" xlink:href="ghc-20171231.xsd#Debt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/DebtDetails1" xlink:href="ghc-20171231.xsd#DebtDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/DebtNarrativeDetails" xlink:href="ghc-20171231.xsd#DebtNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/DebtTables" xlink:href="ghc-20171231.xsd#DebtTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/DiscontinuedOperations" xlink:href="ghc-20171231.xsd#DiscontinuedOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/DiscontinuedOperationsNarrativeDetails" xlink:href="ghc-20171231.xsd#DiscontinuedOperationsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/DiscontinuedOperationsSummarizedIncomeLossFromDiscontinuedOperationsNetOfTaxDetails3" xlink:href="ghc-20171231.xsd#DiscontinuedOperationsSummarizedIncomeLossFromDiscontinuedOperationsNetOfTaxDetails3" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/DiscontinuedOperationsTables" xlink:href="ghc-20171231.xsd#DiscontinuedOperationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/DisontinuedOperationsCarryingAmountOfAssetsAndLiabilitiesIncludedInDiscontinuedOperationsDetails1" xlink:href="ghc-20171231.xsd#DisontinuedOperationsCarryingAmountOfAssetsAndLiabilitiesIncludedInDiscontinuedOperationsDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/DocumentAndEntityInformation" xlink:href="ghc-20171231.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/FairValueMeasurements" xlink:href="ghc-20171231.xsd#FairValueMeasurements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/FairValueMeasurementsDetails1" xlink:href="ghc-20171231.xsd#FairValueMeasurementsDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/FairValueMeasurementsNarrativeDetails" xlink:href="ghc-20171231.xsd#FairValueMeasurementsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/FairValueMeasurementsTables" xlink:href="ghc-20171231.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssets" xlink:href="ghc-20171231.xsd#GoodwillAndOtherIntangibleAssets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillDetails1" xlink:href="ghc-20171231.xsd#GoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsFiniteLivedIntangibleAssetsNarrativeDetails" xlink:href="ghc-20171231.xsd#GoodwillAndOtherIntangibleAssetsFiniteLivedIntangibleAssetsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsGoodwillAndOtherIntangibleAssetsGoodwillNarrativeDetails" xlink:href="ghc-20171231.xsd#GoodwillAndOtherIntangibleAssetsGoodwillAndOtherIntangibleAssetsGoodwillNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsGoodwillAndOtherIntangibleAssetsIndefiniteLivedIntangibleAssetsNarrativeDetails" xlink:href="ghc-20171231.xsd#GoodwillAndOtherIntangibleAssetsGoodwillAndOtherIntangibleAssetsIndefiniteLivedIntangibleAssetsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsOtherIntangibleAssetsDetails2" xlink:href="ghc-20171231.xsd#GoodwillAndOtherIntangibleAssetsOtherIntangibleAssetsDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsTables" xlink:href="ghc-20171231.xsd#GoodwillAndOtherIntangibleAssetsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxes" xlink:href="ghc-20171231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxesDeferredIncomeTaxesComponentsDetails4" xlink:href="ghc-20171231.xsd#IncomeTaxesDeferredIncomeTaxesComponentsDetails4" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxesDeferredTaxValluationAllowancesDetails6" xlink:href="ghc-20171231.xsd#IncomeTaxesDeferredTaxValluationAllowancesDetails6" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxesIncomeFromOperationsDetails1" xlink:href="ghc-20171231.xsd#IncomeTaxesIncomeFromOperationsDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxesIncomeTaxReconciliationDetails3" xlink:href="ghc-20171231.xsd#IncomeTaxesIncomeTaxReconciliationDetails3" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxesIncomeTaxesUnrecognizedTaxBenefitsRollforwardDetails7" xlink:href="ghc-20171231.xsd#IncomeTaxesIncomeTaxesUnrecognizedTaxBenefitsRollforwardDetails7" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxesNarrativeDetails" xlink:href="ghc-20171231.xsd#IncomeTaxesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxesOperatingLossCarryforwardsDetails5" xlink:href="ghc-20171231.xsd#IncomeTaxesOperatingLossCarryforwardsDetails5" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxesProvisionForIncomeTaxesComponentsDetails2" xlink:href="ghc-20171231.xsd#IncomeTaxesProvisionForIncomeTaxesComponentsDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/IncomeTaxesTables" xlink:href="ghc-20171231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/InventoriesAndContractsInProgress" xlink:href="ghc-20171231.xsd#InventoriesAndContractsInProgress" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/InventoriesAndContractsInProgressDetails" xlink:href="ghc-20171231.xsd#InventoriesAndContractsInProgressDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/InventoriesAndContractsInProgressTables" xlink:href="ghc-20171231.xsd#InventoriesAndContractsInProgressTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/Investments" xlink:href="ghc-20171231.xsd#Investments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/InvestmentsInvestmentsInMarketableEquitySecuritiesDetails1" xlink:href="ghc-20171231.xsd#InvestmentsInvestmentsInMarketableEquitySecuritiesDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/InvestmentsNarrativeDetails" xlink:href="ghc-20171231.xsd#InvestmentsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/InvestmentsTables" xlink:href="ghc-20171231.xsd#InvestmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/LeasesAndOtherCommitments" xlink:href="ghc-20171231.xsd#LeasesAndOtherCommitments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/LeasesAndOtherCommitmentsDetails1" xlink:href="ghc-20171231.xsd#LeasesAndOtherCommitmentsDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/LeasesAndOtherCommitmentsNarrativeDetails" xlink:href="ghc-20171231.xsd#LeasesAndOtherCommitmentsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/LeasesAndOtherCommitmentsTables" xlink:href="ghc-20171231.xsd#LeasesAndOtherCommitmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/OrganizationAndNatureOfOperations" xlink:href="ghc-20171231.xsd#OrganizationAndNatureOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/OrganizationAndNatureOfOperationsNarrativeDetails" xlink:href="ghc-20171231.xsd#OrganizationAndNatureOfOperationsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/OtherNonOperatingExpenseIncome" xlink:href="ghc-20171231.xsd#OtherNonOperatingExpenseIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/OtherNonOperatingExpenseIncomeNarrativeDetails" xlink:href="ghc-20171231.xsd#OtherNonOperatingExpenseIncomeNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/OtherNonOperatingExpenseIncomeTables" xlink:href="ghc-20171231.xsd#OtherNonOperatingExpenseIncomeTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/OtherNonOperatingIncomeExpenseDetails1" xlink:href="ghc-20171231.xsd#OtherNonOperatingIncomeExpenseDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlans" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansAccumulatedOtherComprehensiveIncomeDetails7" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansAccumulatedOtherComprehensiveIncomeDetails7" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansAssetAllocationDetails9" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansAssetAllocationDetails9" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansAssumedHealthCareCostTrendRatesDetails12" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansAssumedHealthCareCostTrendRatesDetails12" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansConsolidatedBalanceSheetDetails2" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansConsolidatedBalanceSheetDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansFairValueOfPensionPlanAssetsDetails10" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansFairValueOfPensionPlanAssetsDetails10" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansFutureAmortizationOfNetPeriodicCostDetails8" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansFutureAmortizationOfNetPeriodicCostDetails8" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansFutureEstimatedBenefitPaymentsDetails4" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansFutureEstimatedBenefitPaymentsDetails4" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansKeyAssumptionsCostDetails6" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansKeyAssumptionsCostDetails6" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansKeyAssumptionsObligationDetails3" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansKeyAssumptionsObligationDetails3" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansNarrativeDetails" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansObligationAssetAndFundingInformationDetails1" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansObligationAssetAndFundingInformationDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansReconciliationOfChangeInPensionPlanAssetsFairValueUsingLevel3InputsDetails11" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansReconciliationOfChangeInPensionPlanAssetsFairValueUsingLevel3InputsDetails11" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansTables" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PensionAndPostretirementPlansTotalBenefitCostDetails5" xlink:href="ghc-20171231.xsd#PensionAndPostretirementPlansTotalBenefitCostDetails5" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PropertyPlantAndEquipment" xlink:href="ghc-20171231.xsd#PropertyPlantAndEquipment" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PropertyPlantAndEquipmentDetails" xlink:href="ghc-20171231.xsd#PropertyPlantAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PropertyPlantAndEquipmentNarrativeDetails" xlink:href="ghc-20171231.xsd#PropertyPlantAndEquipmentNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/PropertyPlantAndEquipmentTables" xlink:href="ghc-20171231.xsd#PropertyPlantAndEquipmentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/RedeemablePreferredStock" xlink:href="ghc-20171231.xsd#RedeemablePreferredStock" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/RedeemablePreferredStockDetails" xlink:href="ghc-20171231.xsd#RedeemablePreferredStockDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeNarrativeDetails" xlink:href="ghc-20171231.xsd#SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnaudited" xlink:href="ghc-20171231.xsd#SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnauditedQuarterlyImpactOfCertainItemsDetails2" xlink:href="ghc-20171231.xsd#SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnauditedQuarterlyImpactOfCertainItemsDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnauditedQuarterlyResultsDetails1" xlink:href="ghc-20171231.xsd#SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnauditedQuarterlyResultsDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnauditedTables" xlink:href="ghc-20171231.xsd#SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="ghc-20171231.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:href="ghc-20171231.xsd#SummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesPolicy" xlink:href="ghc-20171231.xsd#SummaryOfSignificantAccountingPoliciesPolicy" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesRecentlyAdoptedAndIssuedAccountingPronoucementsDetails1" xlink:href="ghc-20171231.xsd#SummaryOfSignificantAccountingPoliciesRecentlyAdoptedAndIssuedAccountingPronoucementsDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesRecentlyAdoptedAndIssuedAccountingPronouncementsNarrativeDetails" xlink:href="ghc-20171231.xsd#SummaryOfSignificantAccountingPoliciesRecentlyAdoptedAndIssuedAccountingPronouncementsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables" xlink:href="ghc-20171231.xsd#SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/AccountsReceivableAccountsPayableAndAccruedLiabilities" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/AccountsReceivableAccountsPayableAndAccruedLiabilitiesDetails1" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_415F8E2EC2B541FC1607BA0AB8BEF0F6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_9A6F43737D58B90F70A2BA0AB8BEA382" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_415F8E2EC2B541FC1607BA0AB8BEF0F6" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_9A6F43737D58B90F70A2BA0AB8BEA382" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_4B32BD2BF6DC055816FBBA0AB8BE7BDC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_9A6F43737D58B90F70A2BA0AB8BEA382" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_4B32BD2BF6DC055816FBBA0AB8BE7BDC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_044C9C1E968BAA7FCED0BA0AB8BE904D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_4B32BD2BF6DC055816FBBA0AB8BE7BDC" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_044C9C1E968BAA7FCED0BA0AB8BE904D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_044C9C1E968BAA7FCED0BA0AB8BE904D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_4B32BD2BF6DC055816FBBA0AB8BE7BDC" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_044C9C1E968BAA7FCED0BA0AB8BE904D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsMember" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsMember_6B54833ED960A6F4A976BA0AB8BE4778" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_044C9C1E968BAA7FCED0BA0AB8BE904D" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsMember_6B54833ED960A6F4A976BA0AB8BE4778" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_1BB9D813BD1C0B989051BA0AB8BE4106" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_415F8E2EC2B541FC1607BA0AB8BEF0F6" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_1BB9D813BD1C0B989051BA0AB8BE4106" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_39017D5707CFDB766939BA0AB8BE2AE6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_1BB9D813BD1C0B989051BA0AB8BE4106" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_39017D5707CFDB766939BA0AB8BE2AE6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_DDB7C723D35DAACEDA15BA0AB8BE55FB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_1BB9D813BD1C0B989051BA0AB8BE4106" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_DDB7C723D35DAACEDA15BA0AB8BE55FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_43AB78DC847B0FF2E332BA0AB8BEBD11" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_1BB9D813BD1C0B989051BA0AB8BE4106" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_43AB78DC847B0FF2E332BA0AB8BEBD11" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/AccountsReceivableAccountsPayableAndAccruedLiabilitiesNarrativeDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/AccountsReceivableAccountsPayableAndAccruedLiabilitiesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLossAociBalancesDetails2" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D2FC3348CE0202D19DF3BE716A401022" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_9821F0C581A7649204DCBE716A3A8110" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D2FC3348CE0202D19DF3BE716A401022" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_9821F0C581A7649204DCBE716A3A8110" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_74B61A75253662F3B879BE716A3A7863" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_9821F0C581A7649204DCBE716A3A8110" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_74B61A75253662F3B879BE716A3A7863" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_2A58E056664D559DF613BE716A3BA8E5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_74B61A75253662F3B879BE716A3A7863" xlink:to="loc_us-gaap_EquityComponentDomain_2A58E056664D559DF613BE716A3BA8E5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_2A58E056664D559DF613BE716A3BA8E5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_74B61A75253662F3B879BE716A3A7863" xlink:to="loc_us-gaap_EquityComponentDomain_2A58E056664D559DF613BE716A3BA8E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_3628BADBF9370174C9FEBE716A3B51D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2A58E056664D559DF613BE716A3BA8E5" xlink:to="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_3628BADBF9370174C9FEBE716A3B51D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_1C1702522551E34F2710BE716A3BB531" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_3628BADBF9370174C9FEBE716A3B51D0" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_1C1702522551E34F2710BE716A3BB531" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_91DEC1DFD7459B3A9644BE716A406598" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_3628BADBF9370174C9FEBE716A3B51D0" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_91DEC1DFD7459B3A9644BE716A406598" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D20CF5B80DCBE6669128BE716A405EFE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_3628BADBF9370174C9FEBE716A3B51D0" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D20CF5B80DCBE6669128BE716A405EFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_8231DB467FDF182D5881BE716A404060" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_3628BADBF9370174C9FEBE716A3B51D0" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_8231DB467FDF182D5881BE716A404060" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_47C2D80735422317F775BE716A4065BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D2FC3348CE0202D19DF3BE716A401022" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_47C2D80735422317F775BE716A4065BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_630E71A27D9191038DC4BE716A4009ED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_47C2D80735422317F775BE716A4065BC" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_630E71A27D9191038DC4BE716A4009ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_C7C1F08A5D5995BB0F6FBE716A4048FF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_47C2D80735422317F775BE716A4065BC" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_C7C1F08A5D5995BB0F6FBE716A4048FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_38601D38392DCC7D14BBBE716A408A76" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_47C2D80735422317F775BE716A4065BC" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_38601D38392DCC7D14BBBE716A408A76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_37D32CF70FF160B48DA2BE716A40BD6E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_47C2D80735422317F775BE716A4065BC" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_37D32CF70FF160B48DA2BE716A40BD6E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TaxCutsandJobsAct2017ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarnings" xlink:label="loc_ghc_TaxCutsandJobsAct2017ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarnings_56E5CC18A2A32EC65409BE716A416F83" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_47C2D80735422317F775BE716A4065BC" xlink:to="loc_ghc_TaxCutsandJobsAct2017ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarnings_56E5CC18A2A32EC65409BE716A416F83" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsOfOciDetails1" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherComprehensiveIncomeLossLineItems" xlink:label="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherComprehensiveIncomeLossTable" xlink:label="loc_ghc_OtherComprehensiveIncomeLossTable_5D01F3AC3F2BFC544E2CBE1635B857E9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_ghc_OtherComprehensiveIncomeLossTable_5D01F3AC3F2BFC544E2CBE1635B857E9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_C3012A24B335E2846B1CBE1635B85AA6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_OtherComprehensiveIncomeLossTable_5D01F3AC3F2BFC544E2CBE1635B857E9" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_C3012A24B335E2846B1CBE1635B85AA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_AFD9313DB213936E6C73BE1635B8E2A8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_C3012A24B335E2846B1CBE1635B85AA6" xlink:to="loc_us-gaap_EquityComponentDomain_AFD9313DB213936E6C73BE1635B8E2A8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_AFD9313DB213936E6C73BE1635B8E2A8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_C3012A24B335E2846B1CBE1635B85AA6" xlink:to="loc_us-gaap_EquityComponentDomain_AFD9313DB213936E6C73BE1635B8E2A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_FB9B9279436591737BA9BE1635B8D056" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AFD9313DB213936E6C73BE1635B8E2A8" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_FB9B9279436591737BA9BE1635B8D056" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_D29CE4DE377E1896D85DBE1635B90E44" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AFD9313DB213936E6C73BE1635B8E2A8" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_D29CE4DE377E1896D85DBE1635B90E44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C08C80CAFD520CF13AEABE1635B95E96" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AFD9313DB213936E6C73BE1635B8E2A8" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C08C80CAFD520CF13AEABE1635B95E96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_33172ED9EF67609B8285BE1635B9D5E8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C08C80CAFD520CF13AEABE1635B95E96" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_33172ED9EF67609B8285BE1635B9D5E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_02D2BE1A567CE9CB1F21BE1635B91809" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C08C80CAFD520CF13AEABE1635B95E96" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_02D2BE1A567CE9CB1F21BE1635B91809" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentGainsIncludedInNetIncomeMember" xlink:label="loc_ghc_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentGainsIncludedInNetIncomeMember_0DA43C7F3953CA782085BE1635B9EDA7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C08C80CAFD520CF13AEABE1635B95E96" xlink:to="loc_ghc_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentGainsIncludedInNetIncomeMember_0DA43C7F3953CA782085BE1635B9EDA7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentAndSettlementIncludedInDistributionMember" xlink:label="loc_ghc_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentAndSettlementIncludedInDistributionMember_0167B984FA298B2B1470BE1635BA1712" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C08C80CAFD520CF13AEABE1635B95E96" xlink:to="loc_ghc_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentAndSettlementIncludedInDistributionMember_0167B984FA298B2B1470BE1635BA1712" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_66679EA3D51AA80E295ABE1635BA5CAB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AFD9313DB213936E6C73BE1635B8E2A8" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_66679EA3D51AA80E295ABE1635BA5CAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_17C7F878DE3969432269BE1635BA24EF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_17C7F878DE3969432269BE1635BA24EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_9A77A040278B969AC990BE1635BA67B7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_9A77A040278B969AC990BE1635BA67B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_7B64E49FCB6DC12447F7BE1635BACD55" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_7B64E49FCB6DC12447F7BE1635BACD55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_978E82604F3C3139CBCCBE1635BAFF37" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_978E82604F3C3139CBCCBE1635BAFF37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_42040F41576AC6BD4EC1BE1635BAC0AB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_42040F41576AC6BD4EC1BE1635BAC0AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_9272AADC89EAA31358CEBE1635BA0411" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_9272AADC89EAA31358CEBE1635BA0411" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_08600D5024CCE44B6D0BBE1635BA9D17" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_08600D5024CCE44B6D0BBE1635BA9D17" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_6D22BCF1040C9241C4A6BE1635BBCAA1" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_6D22BCF1040C9241C4A6BE1635BBCAA1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_C1F49A5FACCC4FDA5A82BE1635BB072F" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_OtherComprehensiveIncomeLossLineItems_729FDDB92EA9D1D95677BE1635BA345B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_C1F49A5FACCC4FDA5A82BE1635BB072F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLossReclassificationsOutOfAociDetails3" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_1D94F62CCFE17F9874EABA0AB65BA634" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_1D94F62CCFE17F9874EABA0AB65BA634" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_1F838D6A0361D4CB29C4BA0AB65BD0E0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_1D94F62CCFE17F9874EABA0AB65BA634" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_1F838D6A0361D4CB29C4BA0AB65BD0E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_D417E654BC641E4CEA1DBA0AB65CBD5E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1F838D6A0361D4CB29C4BA0AB65BD0E0" xlink:to="loc_us-gaap_EquityComponentDomain_D417E654BC641E4CEA1DBA0AB65CBD5E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_D417E654BC641E4CEA1DBA0AB65CBD5E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1F838D6A0361D4CB29C4BA0AB65BD0E0" xlink:to="loc_us-gaap_EquityComponentDomain_D417E654BC641E4CEA1DBA0AB65CBD5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_F0E08E829471299E1B53BA0AB65C760C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_D417E654BC641E4CEA1DBA0AB65CBD5E" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_F0E08E829471299E1B53BA0AB65C760C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_B0BEA15A5167FE9F383DBA0AB65C4819" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_D417E654BC641E4CEA1DBA0AB65CBD5E" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_B0BEA15A5167FE9F383DBA0AB65C4819" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C1FDE8F5ACEA91D076EFBA0AB65C03C9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_D417E654BC641E4CEA1DBA0AB65CBD5E" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C1FDE8F5ACEA91D076EFBA0AB65C03C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_EBF90FCA824DEB4F9F9DBA0AB65C7F47" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C1FDE8F5ACEA91D076EFBA0AB65C03C9" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_EBF90FCA824DEB4F9F9DBA0AB65C7F47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_0B730C10F7F4B7DC09DFBA0AB65CD508" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C1FDE8F5ACEA91D076EFBA0AB65C03C9" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_0B730C10F7F4B7DC09DFBA0AB65CD508" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentGainsIncludedInNetIncomeMember" xlink:label="loc_ghc_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentGainsIncludedInNetIncomeMember_33808C5A8BA46338D7B0BA0AB65C51AB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C1FDE8F5ACEA91D076EFBA0AB65C03C9" xlink:to="loc_ghc_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentGainsIncludedInNetIncomeMember_33808C5A8BA46338D7B0BA0AB65C51AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_DD293901B1169975F743BA0AB65CC2FD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_D417E654BC641E4CEA1DBA0AB65CBD5E" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_DD293901B1169975F743BA0AB65CC2FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_D07F291E2B4886600AB5BA0AB65C8EB1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_1D94F62CCFE17F9874EABA0AB65BA634" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_D07F291E2B4886600AB5BA0AB65C8EB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8252A6E617E54758DD2EBA0AB65C555A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_D07F291E2B4886600AB5BA0AB65C8EB1" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8252A6E617E54758DD2EBA0AB65C555A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8252A6E617E54758DD2EBA0AB65C555A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_D07F291E2B4886600AB5BA0AB65C8EB1" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8252A6E617E54758DD2EBA0AB65C555A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_8BFC3CA37FB36445139ABA0AB65C4E52" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8252A6E617E54758DD2EBA0AB65C555A" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_8BFC3CA37FB36445139ABA0AB65C4E52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_555197044A4688C831E1BA0AB65C1439" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_555197044A4688C831E1BA0AB65C1439" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_C6FBA4863A8685C1870ABA0AB65CC80D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:to="loc_us-gaap_InterestExpense_C6FBA4863A8685C1870ABA0AB65CC80D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_C9BEC460266DF639524ABA0AB65C4A35" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_C9BEC460266DF639524ABA0AB65C4A35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_F3CF393CE09AFCDD09C8BA0AB65D5F52" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_F3CF393CE09AFCDD09C8BA0AB65D5F52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_0369FAB91480F7B1684FBA0AB65D2A06" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_0369FAB91480F7B1684FBA0AB65D2A06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_E8FFBC5FDDEE6CE3699FBA0AB65DBA5F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_E8FFBC5FDDEE6CE3699FBA0AB65DBA5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_8EF3BBD21570A1189278BA0AB65D9C49" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_8EF3BBD21570A1189278BA0AB65D9C49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_7F788342AC5D47F43BFFBA0AB65D0666" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1480CE9E5008A1213C10BA0AB65C8715" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_7F788342AC5D47F43BFFBA0AB65D0666" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinesses" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesAcquiredAssetsAndLiabilitiesAssumedDetails1" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C9234353580079F0C69EBA0AB91E087F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C9234353580079F0C69EBA0AB91E087F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_2148A9EE42FF9EF2AFD5BA0AB91EC7F6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C9234353580079F0C69EBA0AB91E087F" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_2148A9EE42FF9EF2AFD5BA0AB91EC7F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_1CEBC68BD99B2F3B8234BA0AB91E4197_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_2148A9EE42FF9EF2AFD5BA0AB91EC7F6" xlink:to="loc_us-gaap_SegmentDomain_1CEBC68BD99B2F3B8234BA0AB91E4197_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_1CEBC68BD99B2F3B8234BA0AB91E4197" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_2148A9EE42FF9EF2AFD5BA0AB91EC7F6" xlink:to="loc_us-gaap_SegmentDomain_1CEBC68BD99B2F3B8234BA0AB91E4197" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherBusinessesMember" xlink:label="loc_ghc_OtherBusinessesMember_DF03E409D21133EAC498BA0AB91ECA3D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_1CEBC68BD99B2F3B8234BA0AB91E4197" xlink:to="loc_ghc_OtherBusinessesMember_DF03E409D21133EAC498BA0AB91ECA3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_C895776B6081047BA6D8BA0AB91FD8A4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C9234353580079F0C69EBA0AB91E087F" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_C895776B6081047BA6D8BA0AB91FD8A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_2F6D602D2FCAA0C9F90FBA0AB91FA06C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_C895776B6081047BA6D8BA0AB91FD8A4" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_2F6D602D2FCAA0C9F90FBA0AB91FA06C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_2F6D602D2FCAA0C9F90FBA0AB91FA06C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_C895776B6081047BA6D8BA0AB91FD8A4" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_2F6D602D2FCAA0C9F90FBA0AB91FA06C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="loc_us-gaap_TradeNamesMember_F0518734408D00C9EFF7BA0AB91F07C4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_2F6D602D2FCAA0C9F90FBA0AB91FA06C" xlink:to="loc_us-gaap_TradeNamesMember_F0518734408D00C9EFF7BA0AB91F07C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_E71A49AFB431C8191632BA0AB91F4AA8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_2F6D602D2FCAA0C9F90FBA0AB91FA06C" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_E71A49AFB431C8191632BA0AB91F4AA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B46963E10637464F4181BA0AB91FA6D0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C9234353580079F0C69EBA0AB91E087F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B46963E10637464F4181BA0AB91FA6D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_DD61B4454F305A79FE20BA0AB91FF3B0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B46963E10637464F4181BA0AB91FA6D0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_DD61B4454F305A79FE20BA0AB91FF3B0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_DD61B4454F305A79FE20BA0AB91FF3B0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B46963E10637464F4181BA0AB91FA6D0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_DD61B4454F305A79FE20BA0AB91FF3B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_FF2A92837C60BAF89A92BA0AB91FC68F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_DD61B4454F305A79FE20BA0AB91FF3B0" xlink:to="loc_us-gaap_CustomerRelationshipsMember_FF2A92837C60BAF89A92BA0AB91FC68F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TrademarksAndTradeNamesMember" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_5DAC320B6AC18C44888DBA0AB91F968D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_DD61B4454F305A79FE20BA0AB91FF3B0" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_5DAC320B6AC18C44888DBA0AB91F968D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DatabasesMember" xlink:label="loc_us-gaap_DatabasesMember_52DDF2D66DDDC437D87BBA0AB91F848E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_DD61B4454F305A79FE20BA0AB91FF3B0" xlink:to="loc_us-gaap_DatabasesMember_52DDF2D66DDDC437D87BBA0AB91F848E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoncompeteAgreementsMember" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_C87AC82152DA02E86A8BBA0AB91FE025" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_DD61B4454F305A79FE20BA0AB91FF3B0" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_C87AC82152DA02E86A8BBA0AB91FE025" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_714DBD955C87C6FF5CCCBA0AB91F1CB8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_DD61B4454F305A79FE20BA0AB91FF3B0" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_714DBD955C87C6FF5CCCBA0AB91F1CB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_F761D2DB2D2887358597BA0AB91F1E13" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C9234353580079F0C69EBA0AB91E087F" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_F761D2DB2D2887358597BA0AB91F1E13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_F761D2DB2D2887358597BA0AB91F1E13" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_F761D2DB2D2887358597BA0AB91F1E13" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HooverTreatedWoodProductsMember" xlink:label="loc_ghc_HooverTreatedWoodProductsMember_C4DEC9DB7E59D533A740BA0AB91FFFD5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C" xlink:to="loc_ghc_HooverTreatedWoodProductsMember_C4DEC9DB7E59D533A740BA0AB91FFFD5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RedMarkerMember" xlink:label="loc_ghc_RedMarkerMember_4DA4CADC27591D429EA7BA0AB91FD82F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C" xlink:to="loc_ghc_RedMarkerMember_4DA4CADC27591D429EA7BA0AB91FD82F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CurrentYearAcquisitionsMember" xlink:label="loc_ghc_CurrentYearAcquisitionsMember_0C61F331C64EF767EE0ABA0AB91FAD00" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C" xlink:to="loc_ghc_CurrentYearAcquisitionsMember_0C61F331C64EF767EE0ABA0AB91FAD00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember" xlink:label="loc_us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember_DFB98E9384B428F6948DBA0AB91FF201" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C" xlink:to="loc_us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember_DFB98E9384B428F6948DBA0AB91FF201" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GenesisMember" xlink:label="loc_ghc_GenesisMember_B0E92BB41F7FAE540270BA0AB91FC387" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C" xlink:to="loc_ghc_GenesisMember_B0E92BB41F7FAE540270BA0AB91FC387" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HometownHomeHealthandHospiceMember" xlink:label="loc_ghc_HometownHomeHealthandHospiceMember_A3FF4165DBE38364218FBA0AB9202110" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7409F383EB789035ADBCBA0AB91F561C" xlink:to="loc_ghc_HometownHomeHealthandHospiceMember_A3FF4165DBE38364218FBA0AB9202110" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_AAEE122E0A2FB0F8963BBA0AB920DE77" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_AAEE122E0A2FB0F8963BBA0AB920DE77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_F2D0D86072BB4B1AA312BA0AB9207C88" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_F2D0D86072BB4B1AA312BA0AB9207C88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_0191957050E72A59759BBA0AB920329D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_0191957050E72A59759BBA0AB920329D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_04E9F68C865E8A3B0491BA0AB92020D3" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_04E9F68C865E8A3B0491BA0AB92020D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_F79606374A3667FF2C20BA0AB920A13E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_Goodwill_F79606374A3667FF2C20BA0AB920A13E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_05A1D8602D55C3BCF0EABA0AB9208FCE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_05A1D8602D55C3BCF0EABA0AB9208FCE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_0CC7A80D4F31C05AA4DDBA0AB9206542" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_0CC7A80D4F31C05AA4DDBA0AB9206542" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssets" xlink:label="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssets_9988A935B69979C5EF13BA0AB9201045" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssets_9988A935B69979C5EF13BA0AB9201045" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedPensionandOtherPostRetirementBenefitsLiabilities" xlink:label="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedPensionandOtherPostRetirementBenefitsLiabilities_24F83E41F19BE56E8335BA0AB9205628" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedPensionandOtherPostRetirementBenefitsLiabilities_24F83E41F19BE56E8335BA0AB9205628" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_25C5AF70D91AB94A1C0FBA0AB920788E" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_25C5AF70D91AB94A1C0FBA0AB920788E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_A6E40701B717463E4050BA0AB9203006" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_A6E40701B717463E4050BA0AB9203006" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_8037B07FC94685221546BA0AB920A5FB" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_8037B07FC94685221546BA0AB920A5FB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillandLiabilitiesAssumedLessNoncontrollingInterestNetOfCashReceived" xlink:label="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillandLiabilitiesAssumedLessNoncontrollingInterestNetOfCashReceived_ADCF491A0D535AD0A990BA0AB92094BF" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillandLiabilitiesAssumedLessNoncontrollingInterestNetOfCashReceived_ADCF491A0D535AD0A990BA0AB92094BF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_5EAC3310851F140C788BBA0AB9205760" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_5EAC3310851F140C788BBA0AB9205760" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_258F5D4449CC7E79F790BA0AB920AEC8" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_258F5D4449CC7E79F790BA0AB920AEC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_15D13FA3CDCAED16915FBA0AB9201BEC" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_15D13FA3CDCAED16915FBA0AB9201BEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_D90C8A76151ADAA55CB4BA0AB9203E30" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_D90C8A76151ADAA55CB4BA0AB9203E30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_17AEE3A0456109416015BA0AB921422B" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_17AEE3A0456109416015BA0AB921422B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_0C01ED8C202CD0328714BA0AB9219488" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B0947758B8953208D8FDBA0AB920D6D1" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_0C01ED8C202CD0328714BA0AB9219488" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3C51524D2F6A6611C6C7BA0AB92F45FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3C51524D2F6A6611C6C7BA0AB92F45FE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_E44759088477793C9C52BA0AB930344A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3C51524D2F6A6611C6C7BA0AB92F45FE" xlink:to="loc_us-gaap_SubsegmentsAxis_E44759088477793C9C52BA0AB930344A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_4B06D90C58E9363BA44CBA0AB930FAC6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_E44759088477793C9C52BA0AB930344A" xlink:to="loc_us-gaap_SubsegmentsDomain_4B06D90C58E9363BA44CBA0AB930FAC6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_4B06D90C58E9363BA44CBA0AB930FAC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_E44759088477793C9C52BA0AB930344A" xlink:to="loc_us-gaap_SubsegmentsDomain_4B06D90C58E9363BA44CBA0AB930FAC6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanInternationalMember" xlink:label="loc_ghc_KaplanInternationalMember_ABEB9BDCB1BD13633B2EBA0AB930B76A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_4B06D90C58E9363BA44CBA0AB930FAC6" xlink:to="loc_ghc_KaplanInternationalMember_ABEB9BDCB1BD13633B2EBA0AB930B76A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_4927CA61A49A764471C2BA0AB93082BA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_4B06D90C58E9363BA44CBA0AB930FAC6" xlink:to="loc_ghc_HigherEducationMember_4927CA61A49A764471C2BA0AB93082BA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionAxis" xlink:label="loc_ghc_TransactionAxis_8593AC794D481D6769B2BA0AB930616D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3C51524D2F6A6611C6C7BA0AB92F45FE" xlink:to="loc_ghc_TransactionAxis_8593AC794D481D6769B2BA0AB930616D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_70E1BF4E9676E77FBD5ABA0AB9304A96_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TransactionAxis_8593AC794D481D6769B2BA0AB930616D" xlink:to="loc_ghc_TransactionTypeDomain_70E1BF4E9676E77FBD5ABA0AB9304A96_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_70E1BF4E9676E77FBD5ABA0AB9304A96" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TransactionAxis_8593AC794D481D6769B2BA0AB930616D" xlink:to="loc_ghc_TransactionTypeDomain_70E1BF4E9676E77FBD5ABA0AB9304A96" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanUniversityTransactionMember" xlink:label="loc_ghc_KaplanUniversityTransactionMember_A292F900C9B80D7021C5BA0AB93071DE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_70E1BF4E9676E77FBD5ABA0AB9304A96" xlink:to="loc_ghc_KaplanUniversityTransactionMember_A292F900C9B80D7021C5BA0AB93071DE" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BerkshireExchangeTransactionMember" xlink:label="loc_ghc_BerkshireExchangeTransactionMember_B9CDCD26EA2A404B98A9BA0AB9302EE9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_70E1BF4E9676E77FBD5ABA0AB9304A96" xlink:to="loc_ghc_BerkshireExchangeTransactionMember_B9CDCD26EA2A404B98A9BA0AB9302EE9" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialAndMichiganHospitalJointVentureMember" xlink:label="loc_ghc_ResidentialAndMichiganHospitalJointVentureMember_25A2F301A22947B6F349BA0AB9300633" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_70E1BF4E9676E77FBD5ABA0AB9304A96" xlink:to="loc_ghc_ResidentialAndMichiganHospitalJointVentureMember_25A2F301A22947B6F349BA0AB9300633" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_25E7D07618D1EA6042CCBA0AB9300FF2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3C51524D2F6A6611C6C7BA0AB92F45FE" xlink:to="loc_dei_LegalEntityAxis_25E7D07618D1EA6042CCBA0AB9300FF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_25E7D07618D1EA6042CCBA0AB9300FF2" xlink:to="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_25E7D07618D1EA6042CCBA0AB9300FF2" xlink:to="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialHealthcareGroupIncMember" xlink:label="loc_ghc_ResidentialHealthcareGroupIncMember_51371CD373655BB801D4BA0AB9309F13" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:to="loc_ghc_ResidentialHealthcareGroupIncMember_51371CD373655BB801D4BA0AB9309F13" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanChinaMember" xlink:label="loc_ghc_KaplanChinaMember_7E7DF7A303BA7DB34D11BA0AB93012D2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:to="loc_ghc_KaplanChinaMember_7E7DF7A303BA7DB34D11BA0AB93012D2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KHECampusesMember" xlink:label="loc_ghc_KHECampusesMember_5EC0DB2842C021746B3CBA0AB93090C2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:to="loc_ghc_KHECampusesMember_5EC0DB2842C021746B3CBA0AB93090C2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BerkshireHathawayIncMember" xlink:label="loc_ghc_BerkshireHathawayIncMember_536DA74FE22972EF6D05BA0AB9317457" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:to="loc_ghc_BerkshireHathawayIncMember_536DA74FE22972EF6D05BA0AB9317457" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_WPLGMember" xlink:label="loc_ghc_WPLGMember_D73C7D95832980459CA9BA0AB93150A7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:to="loc_ghc_WPLGMember_D73C7D95832980459CA9BA0AB93150A7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CelticHealthcareIncMember" xlink:label="loc_ghc_CelticHealthcareIncMember_49431421FEB1456803BCBA0AB931E9DE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:to="loc_ghc_CelticHealthcareIncMember_49431421FEB1456803BCBA0AB931E9DE" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GrahamHealthcareGroupMember" xlink:label="loc_ghc_GrahamHealthcareGroupMember_88E4BA254BBB0AA85855BA0AB93133AF" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:to="loc_ghc_GrahamHealthcareGroupMember_88E4BA254BBB0AA85855BA0AB93133AF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GroupDekkoMember" xlink:label="loc_ghc_GroupDekkoMember_03FD3087532606901D4ABA0AB931DB3A" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_57FBC1296799D20337F6BA0AB9301187" xlink:to="loc_ghc_GroupDekkoMember_03FD3087532606901D4ABA0AB931DB3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_69F8543C8F1808659C39BA0AB931C9B5" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3C51524D2F6A6611C6C7BA0AB92F45FE" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_69F8543C8F1808659C39BA0AB931C9B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_436CE5CF21FCD87A8FB2BA0AB93177E7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_69F8543C8F1808659C39BA0AB931C9B5" xlink:to="loc_us-gaap_SegmentDomain_436CE5CF21FCD87A8FB2BA0AB93177E7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_436CE5CF21FCD87A8FB2BA0AB93177E7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_69F8543C8F1808659C39BA0AB931C9B5" xlink:to="loc_us-gaap_SegmentDomain_436CE5CF21FCD87A8FB2BA0AB93177E7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_DBA541244B88329C3792BA0AB931B78A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_436CE5CF21FCD87A8FB2BA0AB93177E7" xlink:to="loc_ghc_EducationMember_DBA541244B88329C3792BA0AB931B78A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TelevisionBroadcastingMember" xlink:label="loc_ghc_TelevisionBroadcastingMember_DE6B8E718042293ACAE1BA0AB9313ACC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_436CE5CF21FCD87A8FB2BA0AB93177E7" xlink:to="loc_ghc_TelevisionBroadcastingMember_DE6B8E718042293ACAE1BA0AB9313ACC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherBusinessesMember" xlink:label="loc_ghc_OtherBusinessesMember_CD68DB837999F350B947BA0AB931C3CA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_436CE5CF21FCD87A8FB2BA0AB93177E7" xlink:to="loc_ghc_OtherBusinessesMember_CD68DB837999F350B947BA0AB931C3CA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GrahamHealthcareGroupMember" xlink:label="loc_ghc_GrahamHealthcareGroupMember_38FC6C7FF31F25D48E8ABA0AB931080D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_436CE5CF21FCD87A8FB2BA0AB93177E7" xlink:to="loc_ghc_GrahamHealthcareGroupMember_38FC6C7FF31F25D48E8ABA0AB931080D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_1993FE6B34B824D14A65BA0AB931E8C7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3C51524D2F6A6611C6C7BA0AB92F45FE" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_1993FE6B34B824D14A65BA0AB931E8C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1993FE6B34B824D14A65BA0AB931E8C7" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1993FE6B34B824D14A65BA0AB931E8C7" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HometownHomeHealthandHospiceMember" xlink:label="loc_ghc_HometownHomeHealthandHospiceMember_B8ABF687EC891CA2D1D6BA0AB9314265" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_HometownHomeHealthandHospiceMember_B8ABF687EC891CA2D1D6BA0AB9314265" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HooverTreatedWoodProductsMember" xlink:label="loc_ghc_HooverTreatedWoodProductsMember_FEFA4410E285BBABF34ABA0AB931F21C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_HooverTreatedWoodProductsMember_FEFA4410E285BBABF34ABA0AB931F21C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GenesisMember" xlink:label="loc_ghc_GenesisMember_374DED061BA9FE043D30BA0AB93182DE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_GenesisMember_374DED061BA9FE043D30BA0AB93182DE" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RedMarkerMember" xlink:label="loc_ghc_RedMarkerMember_43638D5374741002286BBA0AB932751E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_RedMarkerMember_43638D5374741002286BBA0AB932751E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ManderPortmanWoodwardMember" xlink:label="loc_ghc_ManderPortmanWoodwardMember_F347337ED18DBF4C396CBA0AB932DC2A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_ManderPortmanWoodwardMember_F347337ED18DBF4C396CBA0AB932DC2A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OsborneBooksMember" xlink:label="loc_ghc_OsborneBooksMember_23E730B724121719C13EBA0AB9326073" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_OsborneBooksMember_23E730B724121719C13EBA0AB9326073" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ElectriCableAssembliesMember" xlink:label="loc_ghc_ElectriCableAssembliesMember_492E48E83F1BFFFBF11BBA0AB932C638" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_ElectriCableAssembliesMember_492E48E83F1BFFFBF11BBA0AB932C638" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GroupDekkoMember" xlink:label="loc_ghc_GroupDekkoMember_69A1EB30BCDD65A6F63EBA0AB9322D68" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_GroupDekkoMember_69A1EB30BCDD65A6F63EBA0AB9322D68" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SmartProsMember" xlink:label="loc_ghc_SmartProsMember_536CF2B602260CAC1EE5BA0AB932CF18" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_SmartProsMember_536CF2B602260CAC1EE5BA0AB932CF18" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialHealthcareGroupIncMember" xlink:label="loc_ghc_ResidentialHealthcareGroupIncMember_EA605C747DAC6160E5CFBA0AB932543D" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_ResidentialHealthcareGroupIncMember_EA605C747DAC6160E5CFBA0AB932543D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CurrentYearAcquisitionsMember" xlink:label="loc_ghc_CurrentYearAcquisitionsMember_B707F6C42FDB889905B8BA0AB932E38C" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_CurrentYearAcquisitionsMember_B707F6C42FDB889905B8BA0AB932E38C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_VNATIPHealthcareMember" xlink:label="loc_ghc_VNATIPHealthcareMember_C184A0D85F6818134E9EBA0AB932351C" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_VNATIPHealthcareMember_C184A0D85F6818134E9EBA0AB932351C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_JoyceDaytonCorpMember" xlink:label="loc_ghc_JoyceDaytonCorpMember_14F2A6765C81C2C7FF58BA0AB9327F7F" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_FFA1680190FDABF26EBCBA0AB9319404" xlink:to="loc_ghc_JoyceDaytonCorpMember_14F2A6765C81C2C7FF58BA0AB9327F7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_B3372CE996A915E4C566BA0AB932BE2C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3C51524D2F6A6611C6C7BA0AB92F45FE" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_B3372CE996A915E4C566BA0AB932BE2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_59F8EAE26807C59B895EBA0AB9339389_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_B3372CE996A915E4C566BA0AB932BE2C" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_59F8EAE26807C59B895EBA0AB9339389_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_59F8EAE26807C59B895EBA0AB9339389" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_B3372CE996A915E4C566BA0AB932BE2C" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_59F8EAE26807C59B895EBA0AB9339389" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialHospiceIllinoisMember" xlink:label="loc_ghc_ResidentialHospiceIllinoisMember_A97160E11E0DFC456D0ABA0AB93363DE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_59F8EAE26807C59B895EBA0AB9339389" xlink:to="loc_ghc_ResidentialHospiceIllinoisMember_A97160E11E0DFC456D0ABA0AB93363DE" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialHomeHealthIllinoisMember" xlink:label="loc_ghc_ResidentialHomeHealthIllinoisMember_B294424BEB7EC7F16092BA0AB9334A20" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_59F8EAE26807C59B895EBA0AB9339389" xlink:to="loc_ghc_ResidentialHomeHealthIllinoisMember_B294424BEB7EC7F16092BA0AB9334A20" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember" xlink:label="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_E8E4C703DA09228AF0C1BA0AB9336E50" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_59F8EAE26807C59B895EBA0AB9339389" xlink:to="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_E8E4C703DA09228AF0C1BA0AB9336E50" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupNotDiscontinuedOperationRevenue" xlink:label="loc_ghc_DisposalGroupNotDiscontinuedOperationRevenue_930E8A74D5D5C588411FBA0AB93381F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_DisposalGroupNotDiscontinuedOperationRevenue_930E8A74D5D5C588411FBA0AB93381F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_69EEB386C3B3062CFD27BA0AB933960B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_69EEB386C3B3062CFD27BA0AB933960B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedPensionandOtherPostRetirementBenefitsLiabilities" xlink:label="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedPensionandOtherPostRetirementBenefitsLiabilities_21DB251E8D6D94D1C716BA0AB933863D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedPensionandOtherPostRetirementBenefitsLiabilities_21DB251E8D6D94D1C716BA0AB933863D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NumberOfBusinessesAcquired" xlink:label="loc_us-gaap_NumberOfBusinessesAcquired_B3723EBFC354EB733E4CBA0AB9337D14" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_NumberOfBusinessesAcquired_B3723EBFC354EB733E4CBA0AB9337D14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_CCEDD1FF72F9AF8F8ED9BA0AB9331F38" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_CCEDD1FF72F9AF8F8ED9BA0AB9331F38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_75956586954CA57E1F19BA0AB9339729" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_75956586954CA57E1F19BA0AB9339729" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_34364B55E2A8BF1C583FBA0AB9334A1D" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_34364B55E2A8BF1C583FBA0AB9334A1D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BusinessCombinationAcquisitionOfLessthan100PercentRedeemableNoncontrollingInterestFairValue" xlink:label="loc_ghc_BusinessCombinationAcquisitionOfLessthan100PercentRedeemableNoncontrollingInterestFairValue_B35BEE98D21109395359BA0AB93367B1" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_BusinessCombinationAcquisitionOfLessthan100PercentRedeemableNoncontrollingInterestFairValue_B35BEE98D21109395359BA0AB93367B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts" xlink:label="loc_us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_4BD36A8A01C0DE2FCD50BA0AB933F1AA" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_4BD36A8A01C0DE2FCD50BA0AB933F1AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount" xlink:label="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_ABF20A9D0A75D821F3DDBA0AB933D111" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_ABF20A9D0A75D821F3DDBA0AB933D111" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_2E8E3295F68F11370DA8BA0AB933BBD4" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_2E8E3295F68F11370DA8BA0AB933BBD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_7CE0B8ED2D6C185CC306BA0AB933EC16" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_7CE0B8ED2D6C185CC306BA0AB933EC16" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_F29F953BE301F64AC8B6BA0AB93377C6" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_F29F953BE301F64AC8B6BA0AB93377C6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfNationallyAccreditedGroundCampusesSold" xlink:label="loc_ghc_NumberOfNationallyAccreditedGroundCampusesSold_82720C1ADBAAB763F5DFBA0AB933C4E8" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_NumberOfNationallyAccreditedGroundCampusesSold_82720C1ADBAAB763F5DFBA0AB933C4E8" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ImpairmentOfLongLivedAssets" xlink:label="loc_ghc_ImpairmentOfLongLivedAssets_C12E69430091E0B82022BA0AB9345B10" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_ImpairmentOfLongLivedAssets_C12E69430091E0B82022BA0AB9345B10" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfBusinessesDisposed" xlink:label="loc_ghc_NumberOfBusinessesDisposed_66E44F75201D8A2FF585BA0AB93448AA" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_NumberOfBusinessesDisposed_66E44F75201D8A2FF585BA0AB93448AA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfSchoolsSold" xlink:label="loc_ghc_NumberOfSchoolsSold_01131233A9F3F219CEE1BA0AB93414A7" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_NumberOfSchoolsSold_01131233A9F3F219CEE1BA0AB93414A7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PercentageOfJointVentureSold" xlink:label="loc_ghc_PercentageOfJointVentureSold_70DD2AF71F8AB7E0FB34BA0AB9344378" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_PercentageOfJointVentureSold_70DD2AF71F8AB7E0FB34BA0AB9344378" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NoncontrollingInterestPurchased" xlink:label="loc_ghc_NoncontrollingInterestPurchased_F6043B872D5439AF940CBA0AB93412F5" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_NoncontrollingInterestPurchased_F6043B872D5439AF940CBA0AB93412F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinorityInterestChangeInRedemptionValue" xlink:label="loc_us-gaap_MinorityInterestChangeInRedemptionValue_002DC05509371BC131C1BA0AB9343E75" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_MinorityInterestChangeInRedemptionValue_002DC05509371BC131C1BA0AB9343E75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_2B8430448F46359DC065BA0AB93438AF" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_2B8430448F46359DC065BA0AB93438AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCommonRedemptionValue" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCommonRedemptionValue_7120E004BE0B4B1D170ABA0AB934912B" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCommonRedemptionValue_7120E004BE0B4B1D170ABA0AB934912B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NoncontrollingInterestExchanged" xlink:label="loc_ghc_NoncontrollingInterestExchanged_66633623E5F39D4B69D0BA0AB9344DC0" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_NoncontrollingInterestExchanged_66633623E5F39D4B69D0BA0AB9344DC0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_FAD5CCDB9EB0D4F3A3D6BA0AB9342732" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_FAD5CCDB9EB0D4F3A3D6BA0AB9342732" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PaymentsToAcquireBusinessesPerAgreement" xlink:label="loc_ghc_PaymentsToAcquireBusinessesPerAgreement_C75ED548E740ABBF8879BA0AB9345D94" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_PaymentsToAcquireBusinessesPerAgreement_C75ED548E740ABBF8879BA0AB9345D94" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfTelevisionStationsIncludedInAgreementToAcquire" xlink:label="loc_ghc_NumberOfTelevisionStationsIncludedInAgreementToAcquire_9C2B2E7E04E049999B17BA0AB9350EF4" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_NumberOfTelevisionStationsIncludedInAgreementToAcquire_9C2B2E7E04E049999B17BA0AB9350EF4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberofBusinessLines" xlink:label="loc_ghc_NumberofBusinessLines_212C866D1B2DF5EC85B8BA0AB9354530" xlink:type="locator" />
    <link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_NumberofBusinessLines_212C866D1B2DF5EC85B8BA0AB9354530" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ImmaterialErrorCorrectionAmount" xlink:label="loc_ghc_ImmaterialErrorCorrectionAmount_A73DB97191F5E7FC349FBA0AB935A6CF" xlink:type="locator" />
    <link:definitionArc order="28" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_ImmaterialErrorCorrectionAmount_A73DB97191F5E7FC349FBA0AB935A6CF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberofSharesExchanged" xlink:label="loc_ghc_NumberofSharesExchanged_5A0F0EAEA308C00F51CFBA0AB93524F7" xlink:type="locator" />
    <link:definitionArc order="29" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_NumberofSharesExchanged_5A0F0EAEA308C00F51CFBA0AB93524F7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AmountofCashExchanged" xlink:label="loc_ghc_AmountofCashExchanged_58D8A4EC727B78D65C1ABA0AB935B4C7" xlink:type="locator" />
    <link:definitionArc order="30" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_AmountofCashExchanged_58D8A4EC727B78D65C1ABA0AB935B4C7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberofSharesReceivedinExchange" xlink:label="loc_ghc_NumberofSharesReceivedinExchange_2D85BCC4167946C69559BA0AB9358E23" xlink:type="locator" />
    <link:definitionArc order="31" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_NumberofSharesReceivedinExchange_2D85BCC4167946C69559BA0AB9358E23" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GainonShareExchange" xlink:label="loc_ghc_GainonShareExchange_3D650CFC098CD0F1599EBA0AB935FED5" xlink:type="locator" />
    <link:definitionArc order="32" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_GainonShareExchange_3D650CFC098CD0F1599EBA0AB935FED5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_23D77020BB5F51890646BA0AB9356315" xlink:type="locator" />
    <link:definitionArc order="33" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_23D77020BB5F51890646BA0AB9356315" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AvailableForSaleSecuritiesEquitySecuritiesExchangedFairValue" xlink:label="loc_ghc_AvailableForSaleSecuritiesEquitySecuritiesExchangedFairValue_73E39D5A3979AF9C0A2ABA0AB935FAC5" xlink:type="locator" />
    <link:definitionArc order="34" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_AvailableForSaleSecuritiesEquitySecuritiesExchangedFairValue_73E39D5A3979AF9C0A2ABA0AB935FAC5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EstimatedFairValueofBusinessExchanged" xlink:label="loc_ghc_EstimatedFairValueofBusinessExchanged_0BDE4238D2641B0D5969BA0AB9355F34" xlink:type="locator" />
    <link:definitionArc order="35" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_EstimatedFairValueofBusinessExchanged_0BDE4238D2641B0D5969BA0AB9355F34" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_665F35101220E7A736A9BA0AB935F782" xlink:type="locator" />
    <link:definitionArc order="36" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_665F35101220E7A736A9BA0AB935F782" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PercentageofCelticRevenue" xlink:label="loc_ghc_PercentageofCelticRevenue_7DBC2FCD569AB0970BCDBA0AB935722A" xlink:type="locator" />
    <link:definitionArc order="37" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_PercentageofCelticRevenue_7DBC2FCD569AB0970BCDBA0AB935722A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransitionandOperationsSupportAgreementInitialTerm" xlink:label="loc_ghc_TransitionandOperationsSupportAgreementInitialTerm_07DE601D403CBF8DF556BA0AB935243C" xlink:type="locator" />
    <link:definitionArc order="38" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_TransitionandOperationsSupportAgreementInitialTerm_07DE601D403CBF8DF556BA0AB935243C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransitionandOperationsSupportAgreementBuyOutOptionEligibleYear" xlink:label="loc_ghc_TransitionandOperationsSupportAgreementBuyOutOptionEligibleYear_1A00D804DD41B77BA4CABA0AB93514FD" xlink:type="locator" />
    <link:definitionArc order="39" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FC46C8A64BA17C2355A1BA0AB933B133" xlink:to="loc_ghc_TransitionandOperationsSupportAgreementBuyOutOptionEligibleYear_1A00D804DD41B77BA4CABA0AB93514FD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesProFormaFinancialsDetails2" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesSignificantComponentDetails3" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_779E73BD41C60DDB6D29BA0AB913188A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A9E9F4E5770959D6E18ABA0AB9121EAB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_779E73BD41C60DDB6D29BA0AB913188A" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A9E9F4E5770959D6E18ABA0AB9121EAB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_C10C69D1258FABC2CB7ABA0AB9124327" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A9E9F4E5770959D6E18ABA0AB9121EAB" xlink:to="loc_dei_LegalEntityAxis_C10C69D1258FABC2CB7ABA0AB9124327" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_8F5B746729247C5B2C62BA0AB9124615_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_C10C69D1258FABC2CB7ABA0AB9124327" xlink:to="loc_dei_EntityDomain_8F5B746729247C5B2C62BA0AB9124615_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_8F5B746729247C5B2C62BA0AB9124615" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_C10C69D1258FABC2CB7ABA0AB9124327" xlink:to="loc_dei_EntityDomain_8F5B746729247C5B2C62BA0AB9124615" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KHECampusesMember" xlink:label="loc_ghc_KHECampusesMember_C2350AA949F616F4F5A9BA0AB912129E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8F5B746729247C5B2C62BA0AB9124615" xlink:to="loc_ghc_KHECampusesMember_C2350AA949F616F4F5A9BA0AB912129E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_D4D566F9067064AB2AF0BA0AB9125FB1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A9E9F4E5770959D6E18ABA0AB9121EAB" xlink:to="loc_us-gaap_SubsegmentsAxis_D4D566F9067064AB2AF0BA0AB9125FB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_2B2F0C418A45A0D0A04EBA0AB91215B7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_D4D566F9067064AB2AF0BA0AB9125FB1" xlink:to="loc_us-gaap_SubsegmentsDomain_2B2F0C418A45A0D0A04EBA0AB91215B7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_2B2F0C418A45A0D0A04EBA0AB91215B7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_D4D566F9067064AB2AF0BA0AB9125FB1" xlink:to="loc_us-gaap_SubsegmentsDomain_2B2F0C418A45A0D0A04EBA0AB91215B7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_5C59584AED1D051CEA1DBA0AB913CA20" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_2B2F0C418A45A0D0A04EBA0AB91215B7" xlink:to="loc_ghc_HigherEducationMember_5C59584AED1D051CEA1DBA0AB913CA20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_F16F89A32055D1D42B7FBA0AB9139C49" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A9E9F4E5770959D6E18ABA0AB9121EAB" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_F16F89A32055D1D42B7FBA0AB9139C49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_660EE4D91A9B740CF378BA0AB913E6DD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_F16F89A32055D1D42B7FBA0AB9139C49" xlink:to="loc_us-gaap_SegmentDomain_660EE4D91A9B740CF378BA0AB913E6DD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_660EE4D91A9B740CF378BA0AB913E6DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_F16F89A32055D1D42B7FBA0AB9139C49" xlink:to="loc_us-gaap_SegmentDomain_660EE4D91A9B740CF378BA0AB913E6DD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_64F035F855537770FA50BA0AB9139AC7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_660EE4D91A9B740CF378BA0AB913E6DD" xlink:to="loc_ghc_EducationMember_64F035F855537770FA50BA0AB9139AC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_567C1A8BABE75173EA6DBA0AB91381F5" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A9E9F4E5770959D6E18ABA0AB9121EAB" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_567C1A8BABE75173EA6DBA0AB91381F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_99E141B63BE307B8964ABA0AB9130D5C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_567C1A8BABE75173EA6DBA0AB91381F5" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_99E141B63BE307B8964ABA0AB9130D5C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_99E141B63BE307B8964ABA0AB9130D5C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_567C1A8BABE75173EA6DBA0AB91381F5" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_99E141B63BE307B8964ABA0AB9130D5C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_BB81B53968C893D67DD5BA0AB913EB09" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A9E9F4E5770959D6E18ABA0AB9121EAB" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_BB81B53968C893D67DD5BA0AB913EB09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_DDB8AF6C72663D2A4C33BA0AB913DE8C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_BB81B53968C893D67DD5BA0AB913EB09" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_DDB8AF6C72663D2A4C33BA0AB913DE8C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_DDB8AF6C72663D2A4C33BA0AB913DE8C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_BB81B53968C893D67DD5BA0AB913EB09" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_DDB8AF6C72663D2A4C33BA0AB913DE8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_36B858481F9CFEDE89B6BA0AB913A2D5" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A9E9F4E5770959D6E18ABA0AB9121EAB" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_36B858481F9CFEDE89B6BA0AB913A2D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_B50FDE1ACC29DF6F569BBA0AB9139518_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_36B858481F9CFEDE89B6BA0AB913A2D5" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_B50FDE1ACC29DF6F569BBA0AB9139518_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_B50FDE1ACC29DF6F569BBA0AB9139518" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_36B858481F9CFEDE89B6BA0AB913A2D5" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_B50FDE1ACC29DF6F569BBA0AB9139518" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupNotDiscontinuedOperationRevenue" xlink:label="loc_ghc_DisposalGroupNotDiscontinuedOperationRevenue_DDB01C8A1C3C6A874F2EBA0AB9138B71" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_779E73BD41C60DDB6D29BA0AB913188A" xlink:to="loc_ghc_DisposalGroupNotDiscontinuedOperationRevenue_DDB01C8A1C3C6A874F2EBA0AB9138B71" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupNotDiscontinuedOperationOperatingIncomeLoss" xlink:label="loc_ghc_DisposalGroupNotDiscontinuedOperationOperatingIncomeLoss_ADB209E3A3C0F6EE0CA0BA0AB9137A59" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_779E73BD41C60DDB6D29BA0AB913188A" xlink:to="loc_ghc_DisposalGroupNotDiscontinuedOperationOperatingIncomeLoss_ADB209E3A3C0F6EE0CA0BA0AB9137A59" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/AcquisitionsAndDispositionsOfBusinessesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/BusinessSegments" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/BusinessSegmentsInformationByOperatingSegmentDetails2" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0A8BDDB29334FB0D6E9CBA0AB5A3E69C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0A8BDDB29334FB0D6E9CBA0AB5A3E69C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="loc_us-gaap_ConsolidationItemsAxis_2236248C7BE5C7AAA71BBA0AB5A3B935" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0A8BDDB29334FB0D6E9CBA0AB5A3E69C" xlink:to="loc_us-gaap_ConsolidationItemsAxis_2236248C7BE5C7AAA71BBA0AB5A3B935" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_EC7DA873F5B3C5C4284FBA0AB5A400EB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidationItemsAxis_2236248C7BE5C7AAA71BBA0AB5A3B935" xlink:to="loc_us-gaap_ConsolidationItemsDomain_EC7DA873F5B3C5C4284FBA0AB5A400EB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_EC7DA873F5B3C5C4284FBA0AB5A400EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidationItemsAxis_2236248C7BE5C7AAA71BBA0AB5A3B935" xlink:to="loc_us-gaap_ConsolidationItemsDomain_EC7DA873F5B3C5C4284FBA0AB5A400EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_754471F71BA0E7F53886BA0AB5A49E5F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_EC7DA873F5B3C5C4284FBA0AB5A400EB" xlink:to="loc_us-gaap_OperatingSegmentsMember_754471F71BA0E7F53886BA0AB5A49E5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_9DC5C8A50BEF72042BD0BA0AB5A4C7ED" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_EC7DA873F5B3C5C4284FBA0AB5A400EB" xlink:to="loc_us-gaap_CorporateNonSegmentMember_9DC5C8A50BEF72042BD0BA0AB5A4C7ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="loc_us-gaap_IntersegmentEliminationMember_40BFEED65EB68E1016C2BA0AB5A45747" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_EC7DA873F5B3C5C4284FBA0AB5A400EB" xlink:to="loc_us-gaap_IntersegmentEliminationMember_40BFEED65EB68E1016C2BA0AB5A45747" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_FA74FE2CD0B0E9E735D8BA0AB5A596D5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0A8BDDB29334FB0D6E9CBA0AB5A3E69C" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_FA74FE2CD0B0E9E735D8BA0AB5A596D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_95CF4067283813F1795FBA0AB5A58672_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FA74FE2CD0B0E9E735D8BA0AB5A596D5" xlink:to="loc_us-gaap_SegmentDomain_95CF4067283813F1795FBA0AB5A58672_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_95CF4067283813F1795FBA0AB5A58672" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FA74FE2CD0B0E9E735D8BA0AB5A596D5" xlink:to="loc_us-gaap_SegmentDomain_95CF4067283813F1795FBA0AB5A58672" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_FF37019CAF4B0E821645BA0AB5A53C8A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_95CF4067283813F1795FBA0AB5A58672" xlink:to="loc_ghc_EducationMember_FF37019CAF4B0E821645BA0AB5A53C8A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TelevisionBroadcastingMember" xlink:label="loc_ghc_TelevisionBroadcastingMember_F84FAB114A54B5B0DD5ABA0AB5A58AA6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_95CF4067283813F1795FBA0AB5A58672" xlink:to="loc_ghc_TelevisionBroadcastingMember_F84FAB114A54B5B0DD5ABA0AB5A58AA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="loc_us-gaap_AllOtherSegmentsMember_D27F61BEABC177B9BA47BA0AB5A60A2D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_95CF4067283813F1795FBA0AB5A58672" xlink:to="loc_us-gaap_AllOtherSegmentsMember_D27F61BEABC177B9BA47BA0AB5A60A2D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsAxis" xlink:label="loc_us-gaap_SubsegmentsConsolidationItemsAxis_C1D5E03CBF35132EC268BA0AB5A61613" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0A8BDDB29334FB0D6E9CBA0AB5A3E69C" xlink:to="loc_us-gaap_SubsegmentsConsolidationItemsAxis_C1D5E03CBF35132EC268BA0AB5A61613" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsDomain" xlink:label="loc_us-gaap_SubsegmentsConsolidationItemsDomain_71F95AB9486DE49A432DBA0AB5A65AAD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsAxis_C1D5E03CBF35132EC268BA0AB5A61613" xlink:to="loc_us-gaap_SubsegmentsConsolidationItemsDomain_71F95AB9486DE49A432DBA0AB5A65AAD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsDomain" xlink:label="loc_us-gaap_SubsegmentsConsolidationItemsDomain_71F95AB9486DE49A432DBA0AB5A65AAD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsAxis_C1D5E03CBF35132EC268BA0AB5A61613" xlink:to="loc_us-gaap_SubsegmentsConsolidationItemsDomain_71F95AB9486DE49A432DBA0AB5A65AAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReportableSubsegmentsMember" xlink:label="loc_us-gaap_ReportableSubsegmentsMember_8ADB3DC86C982CF279BEBA0AB5A691F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsDomain_71F95AB9486DE49A432DBA0AB5A65AAD" xlink:to="loc_us-gaap_ReportableSubsegmentsMember_8ADB3DC86C982CF279BEBA0AB5A691F8" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanCorporateAndOtherMember" xlink:label="loc_ghc_KaplanCorporateAndOtherMember_00EFF865DC908165A57ABA0AB5A66530" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsDomain_71F95AB9486DE49A432DBA0AB5A65AAD" xlink:to="loc_ghc_KaplanCorporateAndOtherMember_00EFF865DC908165A57ABA0AB5A66530" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntersubsegmentEliminationsMember" xlink:label="loc_us-gaap_IntersubsegmentEliminationsMember_47612664E32982BC65B1BA0AB5A7984A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsDomain_71F95AB9486DE49A432DBA0AB5A65AAD" xlink:to="loc_us-gaap_IntersubsegmentEliminationsMember_47612664E32982BC65B1BA0AB5A7984A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_6A5C2D9648AB6F217144BA0AB5A7F7C8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0A8BDDB29334FB0D6E9CBA0AB5A3E69C" xlink:to="loc_us-gaap_SubsegmentsAxis_6A5C2D9648AB6F217144BA0AB5A7F7C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_3BE696FFEF67D83A371CBA0AB5A7E756_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_6A5C2D9648AB6F217144BA0AB5A7F7C8" xlink:to="loc_us-gaap_SubsegmentsDomain_3BE696FFEF67D83A371CBA0AB5A7E756_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_3BE696FFEF67D83A371CBA0AB5A7E756" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_6A5C2D9648AB6F217144BA0AB5A7F7C8" xlink:to="loc_us-gaap_SubsegmentsDomain_3BE696FFEF67D83A371CBA0AB5A7E756" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_72468D74E99D84ACDB90BA0AB5A7AC66" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_3BE696FFEF67D83A371CBA0AB5A7E756" xlink:to="loc_ghc_HigherEducationMember_72468D74E99D84ACDB90BA0AB5A7AC66" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TestPreparationMember" xlink:label="loc_ghc_TestPreparationMember_A5287870492B4C66DE28BA0AB5A74580" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_3BE696FFEF67D83A371CBA0AB5A7E756" xlink:to="loc_ghc_TestPreparationMember_A5287870492B4C66DE28BA0AB5A74580" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanInternationalMember" xlink:label="loc_ghc_KaplanInternationalMember_614BBB39562D3323E9B7BA0AB5A7F6AB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_3BE696FFEF67D83A371CBA0AB5A7E756" xlink:to="loc_ghc_KaplanInternationalMember_614BBB39562D3323E9B7BA0AB5A7F6AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_EF5C8E737477CFA0B56BBA0AB5A71844" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_Revenues_EF5C8E737477CFA0B56BBA0AB5A71844" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_C1314380DAB99C86B32EBA0AB5A79634" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_OperatingIncomeLoss_C1314380DAB99C86B32EBA0AB5A79634" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_4C529B9554EB8D0723CBBA0AB5A72403" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_4C529B9554EB8D0723CBBA0AB5A72403" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_F75B37B3EFB244F54C9FBA0AB5A72040" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_F75B37B3EFB244F54C9FBA0AB5A72040" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_FBEEB78E7A3B324A0576BA0AB5A8F804" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_FBEEB78E7A3B324A0576BA0AB5A8F804" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_39D0027C34BF0B914597BA0AB5A888CC" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_39D0027C34BF0B914597BA0AB5A888CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_49F0DA3E497BA60C2CA8BA0AB5A8263D" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_Depreciation_49F0DA3E497BA60C2CA8BA0AB5A8263D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_3CB3BC9721691628AE9FBA0AB5A89AD3" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_3CB3BC9721691628AE9FBA0AB5A89AD3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AmortizationOfIntangibleAssetsAndImpairmentOfGoodwillAndOtherLongLivedAssets" xlink:label="loc_ghc_AmortizationOfIntangibleAssetsAndImpairmentOfGoodwillAndOtherLongLivedAssets_B585F428B83ED00E696FBA0AB5A87424" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_ghc_AmortizationOfIntangibleAssetsAndImpairmentOfGoodwillAndOtherLongLivedAssets_B585F428B83ED00E696FBA0AB5A87424" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ImpairmentOfGoodwillAndOtherLongLivedAssets" xlink:label="loc_ghc_ImpairmentOfGoodwillAndOtherLongLivedAssets_A366F289922DEA3EBC75BA0AB5A83330" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_ghc_ImpairmentOfGoodwillAndOtherLongLivedAssets_A366F289922DEA3EBC75BA0AB5A83330" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_D685E3E34A398DCAE862BA0AB5A8505D" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_D685E3E34A398DCAE862BA0AB5A8505D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PaymentsToAcquirePropertyPlantAndEquipmentFromContinuingOperations" xlink:label="loc_ghc_PaymentsToAcquirePropertyPlantAndEquipmentFromContinuingOperations_E7EBE3A9F1BF5F76ADDCBA0AB5A85CED" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_ghc_PaymentsToAcquirePropertyPlantAndEquipmentFromContinuingOperations_E7EBE3A9F1BF5F76ADDCBA0AB5A85CED" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IdentifiableAssets" xlink:label="loc_ghc_IdentifiableAssets_8C7A3D914E1367EF5F40BA0AB5A86D54" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_ghc_IdentifiableAssets_8C7A3D914E1367EF5F40BA0AB5A86D54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesEquitySecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_982E810B8068DD2C6131BA0AB5A86579" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_982E810B8068DD2C6131BA0AB5A86579" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_D80EBC358F10D636A651BA0AB5A8B983" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_D80EBC358F10D636A651BA0AB5A8B983" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_187312FA299CE29F0258BA0AB5A8608E" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_187312FA299CE29F0258BA0AB5A8608E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_E15DC9F4A353175A0E77BA0AB5A99A34" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_E0251D84E3E06273B4A2BA0AB5A7D52D" xlink:to="loc_us-gaap_Assets_E15DC9F4A353175A0E77BA0AB5A99A34" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/BusinessSegmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5F4931E1E2922FCBA48EBA0AB5C7BDEC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5F4931E1E2922FCBA48EBA0AB5C7BDEC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriorPeriodAdjustmentsAxis" xlink:label="loc_ghc_PriorPeriodAdjustmentsAxis_96302602B87097B148B4BA0AB5C7E7B4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5F4931E1E2922FCBA48EBA0AB5C7BDEC" xlink:to="loc_ghc_PriorPeriodAdjustmentsAxis_96302602B87097B148B4BA0AB5C7E7B4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriorPeriodAdjustmentsDomain" xlink:label="loc_ghc_PriorPeriodAdjustmentsDomain_75EE11B4E901F26B56CEBA0AB5C8F623_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_PriorPeriodAdjustmentsAxis_96302602B87097B148B4BA0AB5C7E7B4" xlink:to="loc_ghc_PriorPeriodAdjustmentsDomain_75EE11B4E901F26B56CEBA0AB5C8F623_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriorPeriodAdjustmentsDomain" xlink:label="loc_ghc_PriorPeriodAdjustmentsDomain_75EE11B4E901F26B56CEBA0AB5C8F623" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_PriorPeriodAdjustmentsAxis_96302602B87097B148B4BA0AB5C7E7B4" xlink:to="loc_ghc_PriorPeriodAdjustmentsDomain_75EE11B4E901F26B56CEBA0AB5C8F623" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_Periodsfrom2011toQ22015Member" xlink:label="loc_ghc_Periodsfrom2011toQ22015Member_CB65270E4D887BC22F9BBA0AB5C89FD2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_PriorPeriodAdjustmentsDomain_75EE11B4E901F26B56CEBA0AB5C8F623" xlink:to="loc_ghc_Periodsfrom2011toQ22015Member_CB65270E4D887BC22F9BBA0AB5C89FD2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_0FBCB0781D984E17AA51BA0AB5C8D2F7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5F4931E1E2922FCBA48EBA0AB5C7BDEC" xlink:to="loc_us-gaap_SubsegmentsAxis_0FBCB0781D984E17AA51BA0AB5C8D2F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_68B4F59A8E65CD657A62BA0AB5C8702D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_0FBCB0781D984E17AA51BA0AB5C8D2F7" xlink:to="loc_us-gaap_SubsegmentsDomain_68B4F59A8E65CD657A62BA0AB5C8702D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_68B4F59A8E65CD657A62BA0AB5C8702D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_0FBCB0781D984E17AA51BA0AB5C8D2F7" xlink:to="loc_us-gaap_SubsegmentsDomain_68B4F59A8E65CD657A62BA0AB5C8702D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_45BAF412045270EBCCC7BA0AB5C8BDF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_68B4F59A8E65CD657A62BA0AB5C8702D" xlink:to="loc_ghc_HigherEducationMember_45BAF412045270EBCCC7BA0AB5C8BDF5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TestPreparationMember" xlink:label="loc_ghc_TestPreparationMember_555EEC939C8F0C3BA2D6BA0AB5C828FD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_68B4F59A8E65CD657A62BA0AB5C8702D" xlink:to="loc_ghc_TestPreparationMember_555EEC939C8F0C3BA2D6BA0AB5C828FD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanInternationalMember" xlink:label="loc_ghc_KaplanInternationalMember_63DE0298DB61F2D751BBBA0AB5C8F280" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_68B4F59A8E65CD657A62BA0AB5C8702D" xlink:to="loc_ghc_KaplanInternationalMember_63DE0298DB61F2D751BBBA0AB5C8F280" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanCorporateAndOtherMember" xlink:label="loc_ghc_KaplanCorporateAndOtherMember_B9CAFF471BED8FFE9056BA0AB5C83211" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_68B4F59A8E65CD657A62BA0AB5C8702D" xlink:to="loc_ghc_KaplanCorporateAndOtherMember_B9CAFF471BED8FFE9056BA0AB5C83211" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_1BBE442175B05E966298BA0AB5C86B21" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5F4931E1E2922FCBA48EBA0AB5C7BDEC" xlink:to="loc_us-gaap_StatementGeographicalAxis_1BBE442175B05E966298BA0AB5C86B21" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_4EC8DEECB6149BA991CDBA0AB5C88CC4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_1BBE442175B05E966298BA0AB5C86B21" xlink:to="loc_us-gaap_SegmentGeographicalDomain_4EC8DEECB6149BA991CDBA0AB5C88CC4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_4EC8DEECB6149BA991CDBA0AB5C88CC4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_1BBE442175B05E966298BA0AB5C86B21" xlink:to="loc_us-gaap_SegmentGeographicalDomain_4EC8DEECB6149BA991CDBA0AB5C88CC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NonUsMember" xlink:label="loc_us-gaap_NonUsMember_67EEE5118F9C18ED2B6CBA0AB5C901AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_4EC8DEECB6149BA991CDBA0AB5C88CC4" xlink:to="loc_us-gaap_NonUsMember_67EEE5118F9C18ED2B6CBA0AB5C901AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_GB" xlink:label="loc_country_GB_8B2B227F1675346A3B8CBA0AB5C9EC9C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_4EC8DEECB6149BA991CDBA0AB5C88CC4" xlink:to="loc_country_GB_8B2B227F1675346A3B8CBA0AB5C9EC9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_A102A2914A9123D089C1BA0AB5C9DD13" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5F4931E1E2922FCBA48EBA0AB5C7BDEC" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_A102A2914A9123D089C1BA0AB5C9DD13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_555E33F4401907770BDEBA0AB5C95173_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A102A2914A9123D089C1BA0AB5C9DD13" xlink:to="loc_us-gaap_SegmentDomain_555E33F4401907770BDEBA0AB5C95173_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_555E33F4401907770BDEBA0AB5C95173" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A102A2914A9123D089C1BA0AB5C9DD13" xlink:to="loc_us-gaap_SegmentDomain_555E33F4401907770BDEBA0AB5C95173" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TelevisionBroadcastingMember" xlink:label="loc_ghc_TelevisionBroadcastingMember_BAC83E71A4211299B715BA0AB5C90685" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_555E33F4401907770BDEBA0AB5C95173" xlink:to="loc_ghc_TelevisionBroadcastingMember_BAC83E71A4211299B715BA0AB5C90685" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_AA6AEECB1125041527CCBA0AB5C9A7D1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_555E33F4401907770BDEBA0AB5C95173" xlink:to="loc_ghc_EducationMember_AA6AEECB1125041527CCBA0AB5C9A7D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_B9DF8D8C60BEBE5C4A2BBA0AB5CA88EB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5F4931E1E2922FCBA48EBA0AB5C7BDEC" xlink:to="loc_dei_LegalEntityAxis_B9DF8D8C60BEBE5C4A2BBA0AB5CA88EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6516E4E5A390790B6979BA0AB5CA09BA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_B9DF8D8C60BEBE5C4A2BBA0AB5CA88EB" xlink:to="loc_dei_EntityDomain_6516E4E5A390790B6979BA0AB5CA09BA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6516E4E5A390790B6979BA0AB5CA09BA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_B9DF8D8C60BEBE5C4A2BBA0AB5CA88EB" xlink:to="loc_dei_EntityDomain_6516E4E5A390790B6979BA0AB5CA09BA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanChinaMember" xlink:label="loc_ghc_KaplanChinaMember_9BDF951A6724B844E9FDBA0AB5CA4324" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6516E4E5A390790B6979BA0AB5CA09BA" xlink:to="loc_ghc_KaplanChinaMember_9BDF951A6724B844E9FDBA0AB5CA4324" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KHECampusesMember" xlink:label="loc_ghc_KHECampusesMember_8C1BD5C6F86256F5A8ECBA0AB5CF298E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6516E4E5A390790B6979BA0AB5CA09BA" xlink:to="loc_ghc_KHECampusesMember_8C1BD5C6F86256F5A8ECBA0AB5CF298E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RestrucuturingSoftwareAssetWriteoffs" xlink:label="loc_ghc_RestrucuturingSoftwareAssetWriteoffs_F39252071C7EEC59FC8ABA0AB5CF6B54" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_ghc_RestrucuturingSoftwareAssetWriteoffs_F39252071C7EEC59FC8ABA0AB5CF6B54" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ImmaterialErrorCorrectionAmount" xlink:label="loc_ghc_ImmaterialErrorCorrectionAmount_F3DC89FDD2D5A892C378BA0AB5D03F20" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_ghc_ImmaterialErrorCorrectionAmount_F3DC89FDD2D5A892C378BA0AB5D03F20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_6484E67E7A041D36F6E9BA0AB5D0E9D7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_us-gaap_NumberOfReportableSegments_6484E67E7A041D36F6E9BA0AB5D0E9D7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfSchoolsSold" xlink:label="loc_ghc_NumberOfSchoolsSold_C78AFFE5B58F74F79562BA0AB5D069E5" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_ghc_NumberOfSchoolsSold_C78AFFE5B58F74F79562BA0AB5D069E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_0408749037539C7FB298BA0AB5D005B3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_us-gaap_RestructuringCharges_0408749037539C7FB298BA0AB5D005B3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfCampusesAnnouncedToCloseOrConsolidate" xlink:label="loc_ghc_NumberOfCampusesAnnouncedToCloseOrConsolidate_A204C43D7EA7D12A8E15BA0AB5D03DEF" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_ghc_NumberOfCampusesAnnouncedToCloseOrConsolidate_A204C43D7EA7D12A8E15BA0AB5D03DEF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfNationallyAccreditedGroundCampusesSold" xlink:label="loc_ghc_NumberOfNationallyAccreditedGroundCampusesSold_BDC8A300040C79CB6A8BBA0AB5D04718" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_ghc_NumberOfNationallyAccreditedGroundCampusesSold_BDC8A300040C79CB6A8BBA0AB5D04718" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TangibleAssetImpairmentCharges" xlink:label="loc_us-gaap_TangibleAssetImpairmentCharges_BA16A35E869B1B56A77EBA0AB5D06F06" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_us-gaap_TangibleAssetImpairmentCharges_BA16A35E869B1B56A77EBA0AB5D06F06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringReserve" xlink:label="loc_us-gaap_RestructuringReserve_67AAAC91C3B1D8F19A04BA0AB5D047C4" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_us-gaap_RestructuringReserve_67AAAC91C3B1D8F19A04BA0AB5D047C4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfTelevisionBroadcastStationsOwned" xlink:label="loc_ghc_NumberOfTelevisionBroadcastStationsOwned_7D111D140303F48EA03BBA0AB5D08EBD" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_ghc_NumberOfTelevisionBroadcastStationsOwned_7D111D140303F48EA03BBA0AB5D08EBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_9D6DD89E46155BA02271BA0AB5D0FB2F" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_us-gaap_Revenues_9D6DD89E46155BA02271BA0AB5D0FB2F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EntityWideDisclosureOnGeographicAreasLongLivedAssetsExcludingGoodwillAndOtherIntangibleAssetsInForeignCountries" xlink:label="loc_ghc_EntityWideDisclosureOnGeographicAreasLongLivedAssetsExcludingGoodwillAndOtherIntangibleAssetsInForeignCountries_3373CF6746766E657C3EBA0AB5D01316" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_FD107494A4CB3D64486BBA0AB5CFD6E9" xlink:to="loc_ghc_EntityWideDisclosureOnGeographicAreasLongLivedAssetsExcludingGoodwillAndOtherIntangibleAssetsInForeignCountries_3373CF6746766E657C3EBA0AB5D01316" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/BusinessSegmentsRestructuringCostsDetails1" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_7CB90AAB46A04C6B4BFDBA0AB5AE5C5B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_39A84E01AFAD87ACE1BDBA0AB5AD0F18" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7CB90AAB46A04C6B4BFDBA0AB5AE5C5B" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_39A84E01AFAD87ACE1BDBA0AB5AD0F18" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_8B9084E037597E705EB5BA0AB5AE91CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_39A84E01AFAD87ACE1BDBA0AB5AD0F18" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_8B9084E037597E705EB5BA0AB5AE91CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_FD9198083A0C0C38FD98BA0AB5AE8454_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8B9084E037597E705EB5BA0AB5AE91CD" xlink:to="loc_us-gaap_SegmentDomain_FD9198083A0C0C38FD98BA0AB5AE8454_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_FD9198083A0C0C38FD98BA0AB5AE8454" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8B9084E037597E705EB5BA0AB5AE91CD" xlink:to="loc_us-gaap_SegmentDomain_FD9198083A0C0C38FD98BA0AB5AE8454" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_3FFF1F0EF4A7CA30C5D3BA0AB5AE3857" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_FD9198083A0C0C38FD98BA0AB5AE8454" xlink:to="loc_ghc_EducationMember_3FFF1F0EF4A7CA30C5D3BA0AB5AE3857" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringReserveAcceleratedDepreciation" xlink:label="loc_us-gaap_RestructuringReserveAcceleratedDepreciation_3B90B87B9C544E060349BA0AB5AEFD54" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7CB90AAB46A04C6B4BFDBA0AB5AE5C5B" xlink:to="loc_us-gaap_RestructuringReserveAcceleratedDepreciation_3B90B87B9C544E060349BA0AB5AEFD54" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RestructuringReserveLeaseObligationLosses" xlink:label="loc_ghc_RestructuringReserveLeaseObligationLosses_376AA5F94063F2164F60BA0AB5AE694A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7CB90AAB46A04C6B4BFDBA0AB5AE5C5B" xlink:to="loc_ghc_RestructuringReserveLeaseObligationLosses_376AA5F94063F2164F60BA0AB5AE694A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SeveranceCosts1" xlink:label="loc_us-gaap_SeveranceCosts1_55495836876DCD8C6BE1BA0AB5AE1AC5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7CB90AAB46A04C6B4BFDBA0AB5AE5C5B" xlink:to="loc_us-gaap_SeveranceCosts1_55495836876DCD8C6BE1BA0AB5AE1AC5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RestrucuturingSoftwareAssetWriteoffs" xlink:label="loc_ghc_RestrucuturingSoftwareAssetWriteoffs_382E675E25877FE2FE73BA0AB5AE1D71" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7CB90AAB46A04C6B4BFDBA0AB5AE5C5B" xlink:to="loc_ghc_RestrucuturingSoftwareAssetWriteoffs_382E675E25877FE2FE73BA0AB5AE1D71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherRestructuringCosts" xlink:label="loc_us-gaap_OtherRestructuringCosts_90E4C74B2CB247961B2EBA0AB5AFF282" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7CB90AAB46A04C6B4BFDBA0AB5AE5C5B" xlink:to="loc_us-gaap_OtherRestructuringCosts_90E4C74B2CB247961B2EBA0AB5AFF282" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_9CE4B621A6809DF8B574BA0AB5AFB512" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7CB90AAB46A04C6B4BFDBA0AB5AE5C5B" xlink:to="loc_us-gaap_RestructuringCharges_9CE4B621A6809DF8B574BA0AB5AFB512" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/BusinessSegmentsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_296198864122B9ABBA17BA0AB5DEF3F2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D89FF06C4A7BF5B2E527BA0AB5D9DFAF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_296198864122B9ABBA17BA0AB5DEF3F2" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D89FF06C4A7BF5B2E527BA0AB5D9DFAF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_FD2781123FA5BA3E1F6DBA0AB5D93540" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D89FF06C4A7BF5B2E527BA0AB5D9DFAF" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_FD2781123FA5BA3E1F6DBA0AB5D93540" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_BF0CB58C1445E0C9C857BA0AB5D9B08F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FD2781123FA5BA3E1F6DBA0AB5D93540" xlink:to="loc_us-gaap_SegmentDomain_BF0CB58C1445E0C9C857BA0AB5D9B08F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_BF0CB58C1445E0C9C857BA0AB5D9B08F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FD2781123FA5BA3E1F6DBA0AB5D93540" xlink:to="loc_us-gaap_SegmentDomain_BF0CB58C1445E0C9C857BA0AB5D9B08F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_F0462E238F7E0F5F49FBBA0AB5DEE01B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_BF0CB58C1445E0C9C857BA0AB5D9B08F" xlink:to="loc_ghc_EducationMember_F0462E238F7E0F5F49FBBA0AB5DEE01B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_299B8ED14903B0205007BA0AB5DE6452" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_296198864122B9ABBA17BA0AB5DEF3F2" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_299B8ED14903B0205007BA0AB5DE6452" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_925BC2AA171AECA613DDBA0AB5DE96DC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_296198864122B9ABBA17BA0AB5DEF3F2" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_925BC2AA171AECA613DDBA0AB5DE96DC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptions" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsAntidilutiveSharesDetails6" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsEarningsPerShareDetails5" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems" xlink:label="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodTable" xlink:label="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodTable_497326FB2CC89D24D3D5BABD82833EEC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodTable_497326FB2CC89D24D3D5BABD82833EEC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_84A982D08A6E002AD1F2BABD8284278C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodTable_497326FB2CC89D24D3D5BABD82833EEC" xlink:to="loc_us-gaap_AwardTypeAxis_84A982D08A6E002AD1F2BABD8284278C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9BC020374E61D1B2CB1CBABD8284DAA4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_84A982D08A6E002AD1F2BABD8284278C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9BC020374E61D1B2CB1CBABD8284DAA4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9BC020374E61D1B2CB1CBABD8284DAA4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_84A982D08A6E002AD1F2BABD8284278C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9BC020374E61D1B2CB1CBABD8284DAA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_11056051536E9ACA3CBCBABD828472C4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9BC020374E61D1B2CB1CBABD8284DAA4" xlink:to="loc_us-gaap_EmployeeStockOptionMember_11056051536E9ACA3CBCBABD828472C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_F11E88B95C25199C8867BABD82840870" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_F11E88B95C25199C8867BABD82840870" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DividendsPaidCommonStockAndSharebasedCompensationCash" xlink:label="loc_ghc_DividendsPaidCommonStockAndSharebasedCompensationCash_ED06F507DA62DDBE5759BABD82842E01" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_ghc_DividendsPaidCommonStockAndSharebasedCompensationCash_ED06F507DA62DDBE5759BABD82842E01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UndistributedEarnings" xlink:label="loc_us-gaap_UndistributedEarnings_6032E7052EA0418F33D5BABD82848303" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_us-gaap_UndistributedEarnings_6032E7052EA0418F33D5BABD82848303" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PercentageOfUndistributedEarningsAllocatedToCommonStockholders" xlink:label="loc_ghc_PercentageOfUndistributedEarningsAllocatedToCommonStockholders_24CDB0833BF703403C79BABD82846CFD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_ghc_PercentageOfUndistributedEarningsAllocatedToCommonStockholders_24CDB0833BF703403C79BABD82846CFD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_UndistributedEarningsAllocatedToCommonStockholders" xlink:label="loc_ghc_UndistributedEarningsAllocatedToCommonStockholders_4BB68C280B3EAF6C0E6DBABD8284FF84" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_ghc_UndistributedEarningsAllocatedToCommonStockholders_4BB68C280B3EAF6C0E6DBABD8284FF84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="loc_us-gaap_DividendsCommonStockCash_44EAAD87A5419D6F6B95BABD82841434" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_us-gaap_DividendsCommonStockCash_44EAAD87A5419D6F6B95BABD82841434" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BasicIncomeFromContinuingOperationsAttributableToCommonStockholders" xlink:label="loc_ghc_BasicIncomeFromContinuingOperationsAttributableToCommonStockholders_D35DA8620ABCC480CF74BABD8284B8B5" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_ghc_BasicIncomeFromContinuingOperationsAttributableToCommonStockholders_D35DA8620ABCC480CF74BABD8284B8B5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AdditionalUndistributedEarningsDueToDilutiveStockOptions" xlink:label="loc_ghc_AdditionalUndistributedEarningsDueToDilutiveStockOptions_7AAA6427C89DE55E081CBABD828440DD" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_ghc_AdditionalUndistributedEarningsDueToDilutiveStockOptions_7AAA6427C89DE55E081CBABD828440DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_F34435DE367B140538C9BABD82849A4E" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_F34435DE367B140538C9BABD82849A4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_76E74B4A8169D4799FB8BABD8284F607" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_76E74B4A8169D4799FB8BABD8284F607" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_42C6FBD83272CB5B058EBABD82843802" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_42C6FBD83272CB5B058EBABD82843802" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_3A5546CAAABE49C22A4FBABD8285A6BB" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_3A5546CAAABE49C22A4FBABD8285A6BB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomePerShareFromContinuingOperationsToCommonStockholdersAbstract" xlink:label="loc_ghc_IncomePerShareFromContinuingOperationsToCommonStockholdersAbstract_0CD84DC5D2E65F21E553BABD8285CDD7" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofEarningsPerShareBasicandDilutedIncludingTwoClassMethodLineItems_0F2530F5C6812B966133BABD82849B5E" xlink:to="loc_ghc_IncomePerShareFromContinuingOperationsToCommonStockholdersAbstract_0CD84DC5D2E65F21E553BABD8285CDD7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_50F414DA956C09E0D973BABD8285F086" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomePerShareFromContinuingOperationsToCommonStockholdersAbstract_0CD84DC5D2E65F21E553BABD8285CDD7" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_50F414DA956C09E0D973BABD8285F086" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_167751F154C4036D4E0ABABD82852AD9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomePerShareFromContinuingOperationsToCommonStockholdersAbstract_0CD84DC5D2E65F21E553BABD8285CDD7" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_167751F154C4036D4E0ABABD82852AD9" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsFairValueAssumptionsDetails4" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_84FA0C38D5EA44E56AB6BE716BEAA1B2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_84FA0C38D5EA44E56AB6BE716BEAA1B2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_38DDB32B0A7293CCC8B5BE716BEAD720" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_84FA0C38D5EA44E56AB6BE716BEAA1B2" xlink:to="loc_us-gaap_RangeAxis_38DDB32B0A7293CCC8B5BE716BEAD720" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_372D1E1BF1FB96AA42F7BE716BEA9DF9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_38DDB32B0A7293CCC8B5BE716BEAD720" xlink:to="loc_us-gaap_RangeMember_372D1E1BF1FB96AA42F7BE716BEA9DF9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_372D1E1BF1FB96AA42F7BE716BEA9DF9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_38DDB32B0A7293CCC8B5BE716BEAD720" xlink:to="loc_us-gaap_RangeMember_372D1E1BF1FB96AA42F7BE716BEA9DF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_0B570390EF4D05B3FFD8BE716BEA496F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_372D1E1BF1FB96AA42F7BE716BEA9DF9" xlink:to="loc_us-gaap_MinimumMember_0B570390EF4D05B3FFD8BE716BEA496F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_E4FFC6057D03DDE655E3BE716BEA3E5E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_372D1E1BF1FB96AA42F7BE716BEA9DF9" xlink:to="loc_us-gaap_MaximumMember_E4FFC6057D03DDE655E3BE716BEA3E5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_80FA7ADD3B6725AA547ABE716BEB1DEE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_80FA7ADD3B6725AA547ABE716BEB1DEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_63D381AFFE8429D8238BBE716BEB6801" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_63D381AFFE8429D8238BBE716BEB6801" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_A7EEFB5300B2BCAECFC6BE716BEBCDB8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_A7EEFB5300B2BCAECFC6BE716BEBCDB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_F93861459C7E2F839127BE716BF09CE3" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_F93861459C7E2F839127BE716BF09CE3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_C142E1CABAEDF86839FBBE716BF0A15A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_C142E1CABAEDF86839FBBE716BF0A15A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_6B33D0D1D9A2DF94C65EBE716BF04F64" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_6B33D0D1D9A2DF94C65EBE716BF04F64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_1434B0199ED3E8D060E2BE716BF00820" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_1434B0199ED3E8D060E2BE716BF00820" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_0FA920EF5C7767C4620EBE716BF06146" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EC3315FD9BF9E21E25DBBE716BEAE9CB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_0FA920EF5C7767C4620EBE716BF06146" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="loc_us-gaap_ConsolidationItemsAxis_FB4887E8D7D8EDFF5A48BA0AB8056A88" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_ConsolidationItemsAxis_FB4887E8D7D8EDFF5A48BA0AB8056A88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_49572B30689B5EB10B9CBA0AB805F15B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidationItemsAxis_FB4887E8D7D8EDFF5A48BA0AB8056A88" xlink:to="loc_us-gaap_ConsolidationItemsDomain_49572B30689B5EB10B9CBA0AB805F15B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_49572B30689B5EB10B9CBA0AB805F15B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidationItemsAxis_FB4887E8D7D8EDFF5A48BA0AB8056A88" xlink:to="loc_us-gaap_ConsolidationItemsDomain_49572B30689B5EB10B9CBA0AB805F15B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_066945B6444E59BD4FF0BA0AB805FEC1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_49572B30689B5EB10B9CBA0AB805F15B" xlink:to="loc_us-gaap_CorporateNonSegmentMember_066945B6444E59BD4FF0BA0AB805FEC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_678FD27552CB9498A36CBA0AB8057193" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_678FD27552CB9498A36CBA0AB8057193" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_90C9B778CAC9B26D48DFBA0AB8057686_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_678FD27552CB9498A36CBA0AB8057193" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_90C9B778CAC9B26D48DFBA0AB8057686_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_90C9B778CAC9B26D48DFBA0AB8057686" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_678FD27552CB9498A36CBA0AB8057193" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_90C9B778CAC9B26D48DFBA0AB8057686" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ExercisePriceAboveFairMarketValueOfCommonStockMember" xlink:label="loc_ghc_ExercisePriceAboveFairMarketValueOfCommonStockMember_F00FF3C9431BA1BD064DBA0AB805C6D1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_90C9B778CAC9B26D48DFBA0AB8057686" xlink:to="loc_ghc_ExercisePriceAboveFairMarketValueOfCommonStockMember_F00FF3C9431BA1BD064DBA0AB805C6D1" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionAxis" xlink:label="loc_ghc_TransactionAxis_14F0155E7D14C59484F3BA0AB805BFFF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_ghc_TransactionAxis_14F0155E7D14C59484F3BA0AB805BFFF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_8F44878F7689F173C935BA0AB805F6EA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TransactionAxis_14F0155E7D14C59484F3BA0AB805BFFF" xlink:to="loc_ghc_TransactionTypeDomain_8F44878F7689F173C935BA0AB805F6EA_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_8F44878F7689F173C935BA0AB805F6EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TransactionAxis_14F0155E7D14C59484F3BA0AB805BFFF" xlink:to="loc_ghc_TransactionTypeDomain_8F44878F7689F173C935BA0AB805F6EA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableSpinOffMember" xlink:label="loc_ghc_CableSpinOffMember_360C464FA2478AC62439BA0AB8058F38" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_8F44878F7689F173C935BA0AB805F6EA" xlink:to="loc_ghc_CableSpinOffMember_360C464FA2478AC62439BA0AB8058F38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_CE72FEB0102B8A73A56CBA0AB80528B9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_StatementScenarioAxis_CE72FEB0102B8A73A56CBA0AB80528B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_D1CAA4EBD139030B45E0BA0AB805DEF6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_CE72FEB0102B8A73A56CBA0AB80528B9" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_D1CAA4EBD139030B45E0BA0AB805DEF6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_D1CAA4EBD139030B45E0BA0AB805DEF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_CE72FEB0102B8A73A56CBA0AB80528B9" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_D1CAA4EBD139030B45E0BA0AB805DEF6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AfterSpinOffofCableONEMember" xlink:label="loc_ghc_AfterSpinOffofCableONEMember_7D74B7B7359F620608ADBA0AB8050F17" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_D1CAA4EBD139030B45E0BA0AB805DEF6" xlink:to="loc_ghc_AfterSpinOffofCableONEMember_7D74B7B7359F620608ADBA0AB8050F17" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BerkshireExchangeTransactionMember" xlink:label="loc_ghc_BerkshireExchangeTransactionMember_8CE05423F4B8F51EEBF4BA0AB8054E14" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_D1CAA4EBD139030B45E0BA0AB805DEF6" xlink:to="loc_ghc_BerkshireExchangeTransactionMember_8CE05423F4B8F51EEBF4BA0AB8054E14" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableSpinOffMember" xlink:label="loc_ghc_CableSpinOffMember_AB31888A2456A2D22C7EBA0AB8056342" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_D1CAA4EBD139030B45E0BA0AB805DEF6" xlink:to="loc_ghc_CableSpinOffMember_AB31888A2456A2D22C7EBA0AB8056342" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SpinoffStockCompensationExpensePeriodAxis" xlink:label="loc_ghc_SpinoffStockCompensationExpensePeriodAxis_B8D219F5A1629BEBBAF6BA0AB805A56B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_ghc_SpinoffStockCompensationExpensePeriodAxis_B8D219F5A1629BEBBAF6BA0AB805A56B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SpinoffStockCompensationExpensePeriodDomain" xlink:label="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_2AF8CFD483A509F7FE73BA0AB8050862_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_SpinoffStockCompensationExpensePeriodAxis_B8D219F5A1629BEBBAF6BA0AB805A56B" xlink:to="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_2AF8CFD483A509F7FE73BA0AB8050862_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SpinoffStockCompensationExpensePeriodDomain" xlink:label="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_2AF8CFD483A509F7FE73BA0AB8050862" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_SpinoffStockCompensationExpensePeriodAxis_B8D219F5A1629BEBBAF6BA0AB805A56B" xlink:to="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_2AF8CFD483A509F7FE73BA0AB8050862" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_July2015throughDecember2018Member" xlink:label="loc_ghc_July2015throughDecember2018Member_B8F5473B3EA323B69228BA0AB8062935" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_2AF8CFD483A509F7FE73BA0AB8050862" xlink:to="loc_ghc_July2015throughDecember2018Member_B8F5473B3EA323B69228BA0AB8062935" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_Q32015Member" xlink:label="loc_ghc_Q32015Member_82750D15DB1A4CA56966BA0AB8061858" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_2AF8CFD483A509F7FE73BA0AB8050862" xlink:to="loc_ghc_Q32015Member_82750D15DB1A4CA56966BA0AB8061858" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_AF61B902CCF1431D4543BA0AB806C0D4" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_StatementClassOfStockAxis_AF61B902CCF1431D4543BA0AB806C0D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_25EA398071410F3AF3E4BA0AB806E8EE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_AF61B902CCF1431D4543BA0AB806C0D4" xlink:to="loc_us-gaap_ClassOfStockDomain_25EA398071410F3AF3E4BA0AB806E8EE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_25EA398071410F3AF3E4BA0AB806E8EE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_AF61B902CCF1431D4543BA0AB806C0D4" xlink:to="loc_us-gaap_ClassOfStockDomain_25EA398071410F3AF3E4BA0AB806E8EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_CE9B4F8AFBDA49A09AE8BA0AB806BB87" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_25EA398071410F3AF3E4BA0AB806E8EE" xlink:to="loc_us-gaap_CommonClassAMember_CE9B4F8AFBDA49A09AE8BA0AB806BB87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_A17D5FB5EC39A6FAA6F8BA0AB8066D1B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_25EA398071410F3AF3E4BA0AB806E8EE" xlink:to="loc_us-gaap_CommonClassBMember_A17D5FB5EC39A6FAA6F8BA0AB8066D1B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanRestrictedStockMember" xlink:label="loc_ghc_KaplanRestrictedStockMember_D42AECC483835422CD5CBA0AB806B93C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_25EA398071410F3AF3E4BA0AB806E8EE" xlink:to="loc_ghc_KaplanRestrictedStockMember_D42AECC483835422CD5CBA0AB806B93C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanStockOptionMember" xlink:label="loc_ghc_KaplanStockOptionMember_6980EB289E52D3570B27BA0AB80633AB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_25EA398071410F3AF3E4BA0AB806E8EE" xlink:to="loc_ghc_KaplanStockOptionMember_6980EB289E52D3570B27BA0AB80633AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_59BB936B9712B6AB222ABA0AB806BA07" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_PlanNameAxis_59BB936B9712B6AB222ABA0AB806BA07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_1EDA541C01C28B92B934BA0AB80655D5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_59BB936B9712B6AB222ABA0AB806BA07" xlink:to="loc_us-gaap_PlanNameDomain_1EDA541C01C28B92B934BA0AB80655D5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_1EDA541C01C28B92B934BA0AB80655D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_59BB936B9712B6AB222ABA0AB806BA07" xlink:to="loc_us-gaap_PlanNameDomain_1EDA541C01C28B92B934BA0AB80655D5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_A2003EmployeeStockOptionPlanMember" xlink:label="loc_ghc_A2003EmployeeStockOptionPlanMember_99D8D1C640388BDFB4D2BA0AB8066497" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_1EDA541C01C28B92B934BA0AB80655D5" xlink:to="loc_ghc_A2003EmployeeStockOptionPlanMember_99D8D1C640388BDFB4D2BA0AB8066497" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_A2012IncentiveCompensationPlanMember" xlink:label="loc_ghc_A2012IncentiveCompensationPlanMember_A6AB4F4218740830E616BA0AB8068DBC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_1EDA541C01C28B92B934BA0AB80655D5" xlink:to="loc_ghc_A2012IncentiveCompensationPlanMember_A6AB4F4218740830E616BA0AB8068DBC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_6F251E451228B75E882CBA0AB8067881" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_6F251E451228B75E882CBA0AB8067881" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_4AA919F4830796023486BA0AB806BDA4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6F251E451228B75E882CBA0AB8067881" xlink:to="loc_us-gaap_SegmentDomain_4AA919F4830796023486BA0AB806BDA4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_4AA919F4830796023486BA0AB806BDA4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6F251E451228B75E882CBA0AB8067881" xlink:to="loc_us-gaap_SegmentDomain_4AA919F4830796023486BA0AB806BDA4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableMember" xlink:label="loc_ghc_CableMember_CAF408EEF46D36E81EE5BA0AB8066BAF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_4AA919F4830796023486BA0AB806BDA4" xlink:to="loc_ghc_CableMember_CAF408EEF46D36E81EE5BA0AB8066BAF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CorporateOfficeMember" xlink:label="loc_ghc_CorporateOfficeMember_C57439DEA8BF05DCA737BA0AB8078374" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_4AA919F4830796023486BA0AB806BDA4" xlink:to="loc_ghc_CorporateOfficeMember_C57439DEA8BF05DCA737BA0AB8078374" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_DFC99704AD378EBAF047BA0AB8078B49" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_4AA919F4830796023486BA0AB806BDA4" xlink:to="loc_ghc_EducationMember_DFC99704AD378EBAF047BA0AB8078B49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DividendsAxis" xlink:label="loc_us-gaap_DividendsAxis_8DE3A52511933402539BBA0AB8074B22" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_DividendsAxis_8DE3A52511933402539BBA0AB8074B22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DividendsDomain" xlink:label="loc_us-gaap_DividendsDomain_AA4905EA9E4F67B72B10BA0AB80776D9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DividendsAxis_8DE3A52511933402539BBA0AB8074B22" xlink:to="loc_us-gaap_DividendsDomain_AA4905EA9E4F67B72B10BA0AB80776D9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DividendsDomain" xlink:label="loc_us-gaap_DividendsDomain_AA4905EA9E4F67B72B10BA0AB80776D9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DividendsAxis_8DE3A52511933402539BBA0AB8074B22" xlink:to="loc_us-gaap_DividendsDomain_AA4905EA9E4F67B72B10BA0AB80776D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_27999342446CE30F37C1BA0AB8075B6B" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_27999342446CE30F37C1BA0AB8075B6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9C372EA5EFB4DFAEDFDEBA0AB8072595_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_27999342446CE30F37C1BA0AB8075B6B" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9C372EA5EFB4DFAEDFDEBA0AB8072595_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9C372EA5EFB4DFAEDFDEBA0AB8072595" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_27999342446CE30F37C1BA0AB8075B6B" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9C372EA5EFB4DFAEDFDEBA0AB8072595" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SaleOfPublishingSubsidiariesMember" xlink:label="loc_ghc_SaleOfPublishingSubsidiariesMember_14FC93EDBD6627DC03DDBA0AB807B009" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9C372EA5EFB4DFAEDFDEBA0AB8072595" xlink:to="loc_ghc_SaleOfPublishingSubsidiariesMember_14FC93EDBD6627DC03DDBA0AB807B009" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOperatingActivitiesSegmentAxis" xlink:label="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_F253CD98C59552FFCB06BA0AB8074585" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_F253CD98C59552FFCB06BA0AB8074585" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_C1473282F7AE3B643A6CBA0AB8077A76_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_F253CD98C59552FFCB06BA0AB8074585" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_C1473282F7AE3B643A6CBA0AB8077A76_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_C1473282F7AE3B643A6CBA0AB8077A76" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_F253CD98C59552FFCB06BA0AB8074585" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_C1473282F7AE3B643A6CBA0AB8077A76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="loc_us-gaap_SegmentDiscontinuedOperationsMember_7F0AB7E6396165D95A56BA0AB807DF38" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentOperatingActivitiesDomain_C1473282F7AE3B643A6CBA0AB8077A76" xlink:to="loc_us-gaap_SegmentDiscontinuedOperationsMember_7F0AB7E6396165D95A56BA0AB807DF38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_F5230EFE730865389CF0BA0AB807D504" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_RangeAxis_F5230EFE730865389CF0BA0AB807D504" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_7521FFC37F1FC39318A1BA0AB807A73C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_F5230EFE730865389CF0BA0AB807D504" xlink:to="loc_us-gaap_RangeMember_7521FFC37F1FC39318A1BA0AB807A73C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_7521FFC37F1FC39318A1BA0AB807A73C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_F5230EFE730865389CF0BA0AB807D504" xlink:to="loc_us-gaap_RangeMember_7521FFC37F1FC39318A1BA0AB807A73C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_10B8743A53202EE3D24CBA0AB8075AFB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_7521FFC37F1FC39318A1BA0AB807A73C" xlink:to="loc_us-gaap_MaximumMember_10B8743A53202EE3D24CBA0AB8075AFB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_DB8F6C628276457B2E19BA0AB807DEEF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_7521FFC37F1FC39318A1BA0AB807A73C" xlink:to="loc_us-gaap_MinimumMember_DB8F6C628276457B2E19BA0AB807DEEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_DDBAB9FA34025BA48E54BA0AB8088B01" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_DDBAB9FA34025BA48E54BA0AB8088B01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_C64CD0CC95A18F5E772ABA0AB8085743_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_DDBAB9FA34025BA48E54BA0AB8088B01" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_C64CD0CC95A18F5E772ABA0AB8085743_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_C64CD0CC95A18F5E772ABA0AB8085743" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_DDBAB9FA34025BA48E54BA0AB8088B01" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_C64CD0CC95A18F5E772ABA0AB8085743" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_4DE51F898906ED91B0CDBA0AB808A8C9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_C64CD0CC95A18F5E772ABA0AB8085743" xlink:to="loc_us-gaap_SubsequentEventMember_4DE51F898906ED91B0CDBA0AB808A8C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:label="loc_us-gaap_TitleOfIndividualAxis_2120292B1E7BB64CFE38BA0AB8083B21" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_TitleOfIndividualAxis_2120292B1E7BB64CFE38BA0AB8083B21" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_50CF7A0FBB4E07CA8E58BA0AB8086650_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TitleOfIndividualAxis_2120292B1E7BB64CFE38BA0AB8083B21" xlink:to="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_50CF7A0FBB4E07CA8E58BA0AB8086650_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_50CF7A0FBB4E07CA8E58BA0AB8086650" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TitleOfIndividualAxis_2120292B1E7BB64CFE38BA0AB8083B21" xlink:to="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_50CF7A0FBB4E07CA8E58BA0AB8086650" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SeniorManagerMember" xlink:label="loc_ghc_SeniorManagerMember_B4C7A0C172AC936AC938BA0AB808421A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_50CF7A0FBB4E07CA8E58BA0AB8086650" xlink:to="loc_ghc_SeniorManagerMember_B4C7A0C172AC936AC938BA0AB808421A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_AC4D99D363794EF5D111BA0AB80867B7" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3964E6608B540CB114BEBA0AB8040EF6" xlink:to="loc_us-gaap_AwardTypeAxis_AC4D99D363794EF5D111BA0AB80867B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_AC4D99D363794EF5D111BA0AB80867B7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_AC4D99D363794EF5D111BA0AB80867B7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_8421BABB62ECB9E15829BA0AB808D349" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44" xlink:to="loc_us-gaap_RestrictedStockMember_8421BABB62ECB9E15829BA0AB808D349" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanStockOptionandRestrictedStockMember" xlink:label="loc_ghc_KaplanStockOptionandRestrictedStockMember_040947D832103ED57862BA0AB8081690" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44" xlink:to="loc_ghc_KaplanStockOptionandRestrictedStockMember_040947D832103ED57862BA0AB8081690" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanStockOptionMember" xlink:label="loc_ghc_KaplanStockOptionMember_E77381881593F70E5E20BA0AB808AA81" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44" xlink:to="loc_ghc_KaplanStockOptionMember_E77381881593F70E5E20BA0AB808AA81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockCompensationPlanMember" xlink:label="loc_us-gaap_StockCompensationPlanMember_236BB041A7EA8B521758BA0AB8085342" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44" xlink:to="loc_us-gaap_StockCompensationPlanMember_236BB041A7EA8B521758BA0AB8085342" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_11C106BF80DEB53DA6FCBA0AB8083EF4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44" xlink:to="loc_us-gaap_EmployeeStockOptionMember_11C106BF80DEB53DA6FCBA0AB8083EF4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_A2017and2015OptionsGrantedMember" xlink:label="loc_ghc_A2017and2015OptionsGrantedMember_74BB5CD2887C459D81C6BA0AB808883E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F79D1A888C113583914FBA0AB808AF44" xlink:to="loc_ghc_A2017and2015OptionsGrantedMember_74BB5CD2887C459D81C6BA0AB808883E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RightToElectBoardOfDirectorsPercentage" xlink:label="loc_ghc_RightToElectBoardOfDirectorsPercentage_02AE3BA88F828BC3B1EABA0AB808C6F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_RightToElectBoardOfDirectorsPercentage_02AE3BA88F828BC3B1EABA0AB808C6F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockSharesAcquired" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_13B5CB1DD2AC621F254FBA0AB809B242" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_13B5CB1DD2AC621F254FBA0AB809B242" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_EE99896F88046592A8DBBA0AB80960B2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_EE99896F88046592A8DBBA0AB80960B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased" xlink:label="loc_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_99ADAE09211931DD7470BA0AB8098B19" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_99ADAE09211931DD7470BA0AB8098B19" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_Stockrepurchaseprogramremainingnumberofsharesauthorizedtoberepurchasedunderpreviousauthorization" xlink:label="loc_ghc_Stockrepurchaseprogramremainingnumberofsharesauthorizedtoberepurchasedunderpreviousauthorization_7F92889E0E10734154BABA0AB8097EA1" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_Stockrepurchaseprogramremainingnumberofsharesauthorizedtoberepurchasedunderpreviousauthorization_7F92889E0E10734154BABA0AB8097EA1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased_5AE017F284E39C5F1FBBBA0AB8099623" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased_5AE017F284E39C5F1FBBBA0AB8099623" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_5132DDF03B939F61509FBA0AB809921F" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_5132DDF03B939F61509FBA0AB809921F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SharebasedcompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedtoanIndividual" xlink:label="loc_ghc_SharebasedcompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedtoanIndividual_FCB4C134E57E0C72E5A7BA0AB80931C4" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_SharebasedcompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedtoanIndividual_FCB4C134E57E0C72E5A7BA0AB80931C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_76E911A656D1A8486FBEBA0AB809DF2E" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_76E911A656D1A8486FBEBA0AB809DF2E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6ACCD8E5881797E382FFBA0AB809894D" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6ACCD8E5881797E382FFBA0AB809894D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_E354C1B6AF1E8C70686CBA0AB8092DFA" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_E354C1B6AF1E8C70686CBA0AB8092DFA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SharebasedCompensationArrangementbySharebasedPaymentAwardPlanModificationNumberOfShares" xlink:label="loc_ghc_SharebasedCompensationArrangementbySharebasedPaymentAwardPlanModificationNumberOfShares_4C1F1440C78150435D27BA0AB809885A" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_SharebasedCompensationArrangementbySharebasedPaymentAwardPlanModificationNumberOfShares_4C1F1440C78150435D27BA0AB809885A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected_559EA1300EB3FA135680BA0AB8091B62" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected_559EA1300EB3FA135680BA0AB8091B62" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber_755A78FD811B2C56A3F7BA0AB809B64D" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber_755A78FD811B2C56A3F7BA0AB809B64D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_CB0A42D3F4B23CA0C788BA0AB809BFBE" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_CB0A42D3F4B23CA0C788BA0AB809BFBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_C39130AC50508BBD33B2BA0AB809D6C0" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_C39130AC50508BBD33B2BA0AB809D6C0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearOne" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearOne_E2AF847A699E05212B9DBA0AB80912F7" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearOne_E2AF847A699E05212B9DBA0AB80912F7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearTwo" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearTwo_E57FDADC15601F146DEBBA0AB809AAF9" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearTwo_E57FDADC15601F146DEBBA0AB809AAF9" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearThree" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearThree_CF22D72B3D4C7EFFBDB5BA0AB80AD0FD" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearThree_CF22D72B3D4C7EFFBDB5BA0AB80AD0FD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearFour" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearFour_5F63CD5AB452AD4C376ABA0AB80AF985" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberYearFour_5F63CD5AB452AD4C376ABA0AB80AF985" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_F1EF1437EF32D5AC1AACBA0AB80A9331" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_F1EF1437EF32D5AC1AACBA0AB80A9331" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_E75F52F8802DCF47C2CDBA0AB80A79CB" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_E75F52F8802DCF47C2CDBA0AB80A79CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_C68D04328F867989999BBA0AB80A764A" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_C68D04328F867989999BBA0AB80A764A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_02F58C633973D243D1E4BA0AB80A87D3" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_02F58C633973D243D1E4BA0AB80A87D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3454721D7D981590CA92BA0AB80AAFC6" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3454721D7D981590CA92BA0AB80AAFC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_5CE658F449BAF28CF2C5BA0AB80A20E4" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_5CE658F449BAF28CF2C5BA0AB80A20E4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableNow" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableNow_CFC3B994717DE5C54738BA0AB80A116C" xlink:type="locator" />
    <link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableNow_CFC3B994717DE5C54738BA0AB80A116C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearOne" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearOne_DB8E682C3364C00DBB02BA0AB80AFB3C" xlink:type="locator" />
    <link:definitionArc order="28" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearOne_DB8E682C3364C00DBB02BA0AB80AFB3C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearTwo" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearTwo_D9B0D96812F5802FCE49BA0AB80A99B4" xlink:type="locator" />
    <link:definitionArc order="29" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearTwo_D9B0D96812F5802FCE49BA0AB80A99B4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearThree" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearThree_FD36ACA0A6E299EAF8B8BA0AB80A325D" xlink:type="locator" />
    <link:definitionArc order="30" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearThree_FD36ACA0A6E299EAF8B8BA0AB80A325D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearFour" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearFour_CF24D45ED69C6E302244BA0AB80AB4A6" xlink:type="locator" />
    <link:definitionArc order="31" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearFour_CF24D45ED69C6E302244BA0AB80AB4A6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearFive" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearFive_D537BE1EDAF77C2F29A4BA0AB80A1A8D" xlink:type="locator" />
    <link:definitionArc order="32" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearFive_D537BE1EDAF77C2F29A4BA0AB80A1A8D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearSix" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearSix_888C15AB11130CD38075BA0AB80A0BA0" xlink:type="locator" />
    <link:definitionArc order="33" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberExercisableYearSix_888C15AB11130CD38075BA0AB80A0BA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_CEB4BF1E0C4CFC0A1279BA0AB80AA2C5" xlink:type="locator" />
    <link:definitionArc order="34" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_CEB4BF1E0C4CFC0A1279BA0AB80AA2C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_07C4D5A32D8BD4721AAFBA0AB80A72D4" xlink:type="locator" />
    <link:definitionArc order="35" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_07C4D5A32D8BD4721AAFBA0AB80A72D4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedIntrinsicValue" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedIntrinsicValue_9F29779A3DABD55BA1D0BA0AB80BA82A" xlink:type="locator" />
    <link:definitionArc order="36" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedIntrinsicValue_9F29779A3DABD55BA1D0BA0AB80BA82A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CommonStockStatedMarketValuePerShare" xlink:label="loc_ghc_CommonStockStatedMarketValuePerShare_673552A1C298AA80E235BA0AB80BA93A" xlink:type="locator" />
    <link:definitionArc order="37" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_CommonStockStatedMarketValuePerShare_673552A1C298AA80E235BA0AB80BA93A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_8C87DDF604FEA1764F24BA0AB80B0E82" xlink:type="locator" />
    <link:definitionArc order="38" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_8C87DDF604FEA1764F24BA0AB80B0E82" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNonvestedWeightedAverageExercisePrice" xlink:label="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNonvestedWeightedAverageExercisePrice_61A3850B66C96B5243AABA0AB80BD811" xlink:type="locator" />
    <link:definitionArc order="39" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNonvestedWeightedAverageExercisePrice_61A3850B66C96B5243AABA0AB80BD811" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingNonvestedWeightedAverageRemainingContractualTerm" xlink:label="loc_ghc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingNonvestedWeightedAverageRemainingContractualTerm_BC67602BAF67E7DFC20EBA0AB80B3C2A" xlink:type="locator" />
    <link:definitionArc order="40" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingNonvestedWeightedAverageRemainingContractualTerm_BC67602BAF67E7DFC20EBA0AB80B3C2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_A9FB21712CFE9A8B8E4DBA0AB80B5638" xlink:type="locator" />
    <link:definitionArc order="41" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_A9FB21712CFE9A8B8E4DBA0AB80B5638" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_80525D61FD346CD7D404BA0AB80BF325" xlink:type="locator" />
    <link:definitionArc order="42" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_80525D61FD346CD7D404BA0AB80BF325" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions_205F7E7FD4E67350D331BA0AB80BE8CF" xlink:type="locator" />
    <link:definitionArc order="43" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions_205F7E7FD4E67350D331BA0AB80BE8CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_387D618223F68FA46011BA0AB80BAE58" xlink:type="locator" />
    <link:definitionArc order="44" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_387D618223F68FA46011BA0AB80BAE58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_D8DFF35DAE096C9D35E9BA0AB80BB257" xlink:type="locator" />
    <link:definitionArc order="45" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_D8DFF35DAE096C9D35E9BA0AB80BB257" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_FairValueOfCompanyCommonStock" xlink:label="loc_ghc_FairValueOfCompanyCommonStock_F82E03C71010CE819F12BA0AB80B06F1" xlink:type="locator" />
    <link:definitionArc order="46" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_FairValueOfCompanyCommonStock_F82E03C71010CE819F12BA0AB80B06F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_094EC97B97985316BA91BA0AB80B8D6B" xlink:type="locator" />
    <link:definitionArc order="47" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_094EC97B97985316BA91BA0AB80B8D6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent" xlink:label="loc_us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent_E18F987E20AC10038A53BA0AB80B632B" xlink:type="locator" />
    <link:definitionArc order="48" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent_E18F987E20AC10038A53BA0AB80B632B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid_099C4CD21FCC44FDF1C2BA0AB80B63BB" xlink:type="locator" />
    <link:definitionArc order="49" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid_099C4CD21FCC44FDF1C2BA0AB80B63BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_78E54E69F5FFA8AD174CBA0AB80BED82" xlink:type="locator" />
    <link:definitionArc order="50" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_78E54E69F5FFA8AD174CBA0AB80BED82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_6C1EA99FDF9DD88C6A16BA0AB80B9A0F" xlink:type="locator" />
    <link:definitionArc order="51" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_6C1EA99FDF9DD88C6A16BA0AB80B9A0F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PercentageOfConversionFromOneClassOfStockToAnother" xlink:label="loc_ghc_PercentageOfConversionFromOneClassOfStockToAnother_A2C1A2F07C22D6FDD9AABA0AB80B77AB" xlink:type="locator" />
    <link:definitionArc order="52" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_ghc_PercentageOfConversionFromOneClassOfStockToAnother_A2C1A2F07C22D6FDD9AABA0AB80B77AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConversionOfStockSharesConverted1" xlink:label="loc_us-gaap_ConversionOfStockSharesConverted1_C31672ACBC251217B1ECBA0AB80BF794" xlink:type="locator" />
    <link:definitionArc order="53" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_C381E831729194DD6CECBA0AB8084B8E" xlink:to="loc_us-gaap_ConversionOfStockSharesConverted1_C31672ACBC251217B1ECBA0AB80BF794" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsOptionsOutstandingAndExercisableDetails3" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_F3CAEE564634654081BCBA6EA5602DA3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_F3CAEE564634654081BCBA6EA5602DA3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_76747AC13205029161FCBA6EA56010CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_F3CAEE564634654081BCBA6EA5602DA3" xlink:to="loc_us-gaap_PlanNameAxis_76747AC13205029161FCBA6EA56010CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_2BE3DA485669361F8B0EBA6EA56019E3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_76747AC13205029161FCBA6EA56010CC" xlink:to="loc_us-gaap_PlanNameDomain_2BE3DA485669361F8B0EBA6EA56019E3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_2BE3DA485669361F8B0EBA6EA56019E3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_76747AC13205029161FCBA6EA56010CC" xlink:to="loc_us-gaap_PlanNameDomain_2BE3DA485669361F8B0EBA6EA56019E3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_A2012IncentiveCompensationPlanMember" xlink:label="loc_ghc_A2012IncentiveCompensationPlanMember_3485F6FCF7F5C62B7493BA6EA56044B8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_2BE3DA485669361F8B0EBA6EA56019E3" xlink:to="loc_ghc_A2012IncentiveCompensationPlanMember_3485F6FCF7F5C62B7493BA6EA56044B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_B4368BE0E8185E71D849BA6EA560D4B4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_F3CAEE564634654081BCBA6EA5602DA3" xlink:to="loc_us-gaap_AwardTypeAxis_B4368BE0E8185E71D849BA6EA560D4B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0883F46329EC4E93F2F2BA6EA560867F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_B4368BE0E8185E71D849BA6EA560D4B4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0883F46329EC4E93F2F2BA6EA560867F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0883F46329EC4E93F2F2BA6EA560867F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_B4368BE0E8185E71D849BA6EA560D4B4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0883F46329EC4E93F2F2BA6EA560867F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanStockOptionandRestrictedStockMember" xlink:label="loc_ghc_KaplanStockOptionandRestrictedStockMember_2253A8AC14F10312B361BA6EA560C410" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0883F46329EC4E93F2F2BA6EA560867F" xlink:to="loc_ghc_KaplanStockOptionandRestrictedStockMember_2253A8AC14F10312B361BA6EA560C410" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_E7BF3DA963021CBCA155BA6EA5619902" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_F3CAEE564634654081BCBA6EA5602DA3" xlink:to="loc_us-gaap_StatementClassOfStockAxis_E7BF3DA963021CBCA155BA6EA5619902" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_051B5709EAC4E3032F12BA6EA56118D3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_E7BF3DA963021CBCA155BA6EA5619902" xlink:to="loc_us-gaap_ClassOfStockDomain_051B5709EAC4E3032F12BA6EA56118D3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_051B5709EAC4E3032F12BA6EA56118D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_E7BF3DA963021CBCA155BA6EA5619902" xlink:to="loc_us-gaap_ClassOfStockDomain_051B5709EAC4E3032F12BA6EA56118D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_BE1CABF45CFA9FEC1610BA6EA5617039" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_051B5709EAC4E3032F12BA6EA56118D3" xlink:to="loc_us-gaap_CommonClassBMember_BE1CABF45CFA9FEC1610BA6EA5617039" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_7EDA0148F6E582165DCBBA6EA5618322" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_F3CAEE564634654081BCBA6EA5602DA3" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_7EDA0148F6E582165DCBBA6EA5618322" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_974F0BE8D8E73F55594ABA6EA5611A1D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_7EDA0148F6E582165DCBBA6EA5618322" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_974F0BE8D8E73F55594ABA6EA5611A1D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_974F0BE8D8E73F55594ABA6EA5611A1D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_7EDA0148F6E582165DCBBA6EA5618322" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_974F0BE8D8E73F55594ABA6EA5611A1D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriceRangeOneMember" xlink:label="loc_ghc_PriceRangeOneMember_59F8C3D8039F3AAE181DBA6EA561B739" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_974F0BE8D8E73F55594ABA6EA5611A1D" xlink:to="loc_ghc_PriceRangeOneMember_59F8C3D8039F3AAE181DBA6EA561B739" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriceRangeTwoMember" xlink:label="loc_ghc_PriceRangeTwoMember_CD130BB3E608CC25232EBA6EA561E728" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_974F0BE8D8E73F55594ABA6EA5611A1D" xlink:to="loc_ghc_PriceRangeTwoMember_CD130BB3E608CC25232EBA6EA561E728" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriceRangeThreeMember" xlink:label="loc_ghc_PriceRangeThreeMember_548BD171EA2037039E8CBA6EA5616EEB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_974F0BE8D8E73F55594ABA6EA5611A1D" xlink:to="loc_ghc_PriceRangeThreeMember_548BD171EA2037039E8CBA6EA5616EEB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriceRangeFourMember" xlink:label="loc_ghc_PriceRangeFourMember_ACFE73D8546240F709F3BA6EA561952B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_974F0BE8D8E73F55594ABA6EA5611A1D" xlink:to="loc_ghc_PriceRangeFourMember_ACFE73D8546240F709F3BA6EA561952B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_58FF375A989BDDA43193BA6EA561DC0A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_58FF375A989BDDA43193BA6EA561DC0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_FF4668C532BEB6FFA432BA6EA561664D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_FF4668C532BEB6FFA432BA6EA561664D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_4E7BF471D5F6D1FB1415BA6EA561DB10" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_4E7BF471D5F6D1FB1415BA6EA561DB10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_08C035BADE6E22CD48FABA6EA5628C3A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_08C035BADE6E22CD48FABA6EA5628C3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_BD3EB389A26EE04F9565BA6EA5629FDB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_BD3EB389A26EE04F9565BA6EA5629FDB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_01B25F1455C63603D39BBA6EA5620C2A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_01B25F1455C63603D39BBA6EA5620C2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_D51E51F9311A8D2D5D2FBA6EA562DB8A" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_D51E51F9311A8D2D5D2FBA6EA562DB8A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_45BEEECDD1645633EA62BA6EA56254A0" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9729E335C1201BD00FCABA6EA5618F85" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_45BEEECDD1645633EA62BA6EA56254A0" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsStockAwardsRollforwardDetails1" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsStockOptionsRollforwardDetails2" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CE15EC70BE6FB538EF64BA0AB7E9BE2A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C39FCA781D738503416BA0AB7E82BC3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CE15EC70BE6FB538EF64BA0AB7E9BE2A" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C39FCA781D738503416BA0AB7E82BC3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_B12D55E41098C57EEC0ABA0AB7E8E9D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C39FCA781D738503416BA0AB7E82BC3" xlink:to="loc_us-gaap_AwardTypeAxis_B12D55E41098C57EEC0ABA0AB7E8E9D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7CFBBF79825CE0E99F7DBA0AB7E92A7E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_B12D55E41098C57EEC0ABA0AB7E8E9D2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7CFBBF79825CE0E99F7DBA0AB7E92A7E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7CFBBF79825CE0E99F7DBA0AB7E92A7E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_B12D55E41098C57EEC0ABA0AB7E8E9D2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7CFBBF79825CE0E99F7DBA0AB7E92A7E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_1FBD7AE835FF9CCD0D03BA0AB7E98A49" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7CFBBF79825CE0E99F7DBA0AB7E92A7E" xlink:to="loc_us-gaap_EmployeeStockOptionMember_1FBD7AE835FF9CCD0D03BA0AB7E98A49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_F6AEB2D037F2B9953836BA0AB7E9D199" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C39FCA781D738503416BA0AB7E82BC3" xlink:to="loc_us-gaap_StatementClassOfStockAxis_F6AEB2D037F2B9953836BA0AB7E9D199" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_0E47F2F47C5196F78B2BBA0AB7E9ED7B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_F6AEB2D037F2B9953836BA0AB7E9D199" xlink:to="loc_us-gaap_ClassOfStockDomain_0E47F2F47C5196F78B2BBA0AB7E9ED7B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_0E47F2F47C5196F78B2BBA0AB7E9ED7B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_F6AEB2D037F2B9953836BA0AB7E9D199" xlink:to="loc_us-gaap_ClassOfStockDomain_0E47F2F47C5196F78B2BBA0AB7E9ED7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_ED43553CB4D35286E1AABA0AB7E9884B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_0E47F2F47C5196F78B2BBA0AB7E9ED7B" xlink:to="loc_us-gaap_CommonClassBMember_ED43553CB4D35286E1AABA0AB7E9884B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_601CB4B8F15149FD4DBFBA0AB7E9EC3F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C39FCA781D738503416BA0AB7E82BC3" xlink:to="loc_us-gaap_StatementScenarioAxis_601CB4B8F15149FD4DBFBA0AB7E9EC3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_07DF7962A7A61CF38A45BA0AB7E938F5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_601CB4B8F15149FD4DBFBA0AB7E9EC3F" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_07DF7962A7A61CF38A45BA0AB7E938F5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_07DF7962A7A61CF38A45BA0AB7E938F5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_601CB4B8F15149FD4DBFBA0AB7E9EC3F" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_07DF7962A7A61CF38A45BA0AB7E938F5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BeforeSpinoffofCableONEMember" xlink:label="loc_ghc_BeforeSpinoffofCableONEMember_B9C5536F71AC19EF3262BA0AB7E9F5F5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_07DF7962A7A61CF38A45BA0AB7E938F5" xlink:to="loc_ghc_BeforeSpinoffofCableONEMember_B9C5536F71AC19EF3262BA0AB7E9F5F5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AfterSpinOffofCableONEMember" xlink:label="loc_ghc_AfterSpinOffofCableONEMember_795942445CBDB9993722BA0AB7E9A84B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_07DF7962A7A61CF38A45BA0AB7E938F5" xlink:to="loc_ghc_AfterSpinOffofCableONEMember_795942445CBDB9993722BA0AB7E9A84B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_D5D1DAFB78ADA28D59F9BA0AB7E9D7C6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CE15EC70BE6FB538EF64BA0AB7E9BE2A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_D5D1DAFB78ADA28D59F9BA0AB7E9D7C6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_619F6FC241EBBB2B807CBA0AB7EA4CCD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_D5D1DAFB78ADA28D59F9BA0AB7E9D7C6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_619F6FC241EBBB2B807CBA0AB7EA4CCD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_A2CFB1D5F509156E4FA9BA0AB7EA8BCF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_D5D1DAFB78ADA28D59F9BA0AB7E9D7C6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_A2CFB1D5F509156E4FA9BA0AB7EA8BCF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_F612D6AB2153374F1828BA0AB7EA5FE6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_D5D1DAFB78ADA28D59F9BA0AB7E9D7C6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_F612D6AB2153374F1828BA0AB7EA5FE6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_10584D267D55DCD17A26BA0AB7EA3343" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_D5D1DAFB78ADA28D59F9BA0AB7E9D7C6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_10584D267D55DCD17A26BA0AB7EA3343" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_2DF33E5372204180D3E3BA0AB7EA59FE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CE15EC70BE6FB538EF64BA0AB7E9BE2A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_2DF33E5372204180D3E3BA0AB7EA59FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_01C06034561BB6A6A3D6BA0AB7EA72D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_2DF33E5372204180D3E3BA0AB7EA59FE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_01C06034561BB6A6A3D6BA0AB7EA72D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_26A215F72723AE4DC41DBA0AB7EB4BA6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_2DF33E5372204180D3E3BA0AB7EA59FE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_26A215F72723AE4DC41DBA0AB7EB4BA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_2ED84DF62EA3715E4AAEBA0AB7EB8DB2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_2DF33E5372204180D3E3BA0AB7EA59FE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_2ED84DF62EA3715E4AAEBA0AB7EB8DB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_44B6C9BE9E0A104B9664BA0AB7EBAEDB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_2DF33E5372204180D3E3BA0AB7EA59FE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_44B6C9BE9E0A104B9664BA0AB7EBAEDB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/CapitalStockStockAwardsAndStockOptionsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_64EEDF1D0D6767EC177ABA0AB9CFD5ED" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_0C5FEC8E2FE5392A381CBA0AB9C99E20" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_64EEDF1D0D6767EC177ABA0AB9CFD5ED" xlink:to="loc_us-gaap_StatementTable_0C5FEC8E2FE5392A381CBA0AB9C99E20" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_6BC35F03F147D0FBD407BA0AB9C92E38" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_0C5FEC8E2FE5392A381CBA0AB9C99E20" xlink:to="loc_us-gaap_StatementClassOfStockAxis_6BC35F03F147D0FBD407BA0AB9C92E38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_0390B57A2134298356E9BA0AB9C93F43_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6BC35F03F147D0FBD407BA0AB9C92E38" xlink:to="loc_us-gaap_ClassOfStockDomain_0390B57A2134298356E9BA0AB9C93F43_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_0390B57A2134298356E9BA0AB9C93F43" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6BC35F03F147D0FBD407BA0AB9C92E38" xlink:to="loc_us-gaap_ClassOfStockDomain_0390B57A2134298356E9BA0AB9C93F43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_6E9A7F4BA1ED2FA929D2BA0AB9C9F930" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_0390B57A2134298356E9BA0AB9C93F43" xlink:to="loc_us-gaap_CommonClassAMember_6E9A7F4BA1ED2FA929D2BA0AB9C9F930" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_D10E41B995D32BE05552BA0AB9CAA48A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_0390B57A2134298356E9BA0AB9C93F43" xlink:to="loc_us-gaap_CommonClassBMember_D10E41B995D32BE05552BA0AB9CAA48A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_64EEDF1D0D6767EC177ABA0AB9CFD5ED" xlink:to="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_EFEFEE9345D14B438393BA0AB9CFD94F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_EFEFEE9345D14B438393BA0AB9CFD94F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_2A2B91FC7B1FF8877CE8BA0AB9CFC3F3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_2A2B91FC7B1FF8877CE8BA0AB9CFC3F3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_InvestmentsInMarketableEquitySecuritiesAndOtherInvestments" xlink:label="loc_ghc_InvestmentsInMarketableEquitySecuritiesAndOtherInvestments_46161DB62F45D4DEF270BA0AB9CF9415" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:to="loc_ghc_InvestmentsInMarketableEquitySecuritiesAndOtherInvestments_46161DB62F45D4DEF270BA0AB9CF9415" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsAndOtherReceivablesNetCurrent" xlink:label="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_695248257B974396E114BA0AB9CFDEEF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:to="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_695248257B974396E114BA0AB9CFDEEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxesReceivable" xlink:label="loc_us-gaap_IncomeTaxesReceivable_8F8DF39D5965D949933BBA0AB9CFA275" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:to="loc_us-gaap_IncomeTaxesReceivable_8F8DF39D5965D949933BBA0AB9CFA275" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetCurrent_24E66B8675DE4EB73844BA0AB9CFBFA2" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:to="loc_us-gaap_DeferredTaxAssetsNetCurrent_24E66B8675DE4EB73844BA0AB9CFBFA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings" xlink:label="loc_us-gaap_InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings_CC4B8F5F19CCD331FB65BA0AB9D0A4EC" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:to="loc_us-gaap_InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings_CC4B8F5F19CCD331FB65BA0AB9D0A4EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_5E3BC75C0FC958791626BA0AB9D00CCD" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:to="loc_us-gaap_OtherAssetsCurrent_5E3BC75C0FC958791626BA0AB9D00CCD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_81DCC89F5BA422EA3E0ABA0AB9D0A823" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_08B3771A10B6E697FFDCBA0AB9CF7709" xlink:to="loc_us-gaap_AssetsCurrent_81DCC89F5BA422EA3E0ABA0AB9D0A823" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_C9A4FE6C40CD8C1A0D3EBA0AB9D0B6A6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_C9A4FE6C40CD8C1A0D3EBA0AB9D0B6A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_642518B68932B447FE0DBA0AB9D04E05" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_642518B68932B447FE0DBA0AB9D04E05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_1DC876293C46C049F56BBA0AB9D0BEB9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_Goodwill_1DC876293C46C049F56BBA0AB9D0BEB9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_1FF29FE51AA01F436985BA0AB9D074C3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_1FF29FE51AA01F436985BA0AB9D074C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_F3E9CD6FD0D61DC9541EBA0AB9D0CCBD" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_F3E9CD6FD0D61DC9541EBA0AB9D0CCBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_AB3EA7A4AE121C4385EEBA0AB9D03DBB" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_AB3EA7A4AE121C4385EEBA0AB9D03DBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_273E8177A92FAC0D872EBA0AB9D0CF6C" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_273E8177A92FAC0D872EBA0AB9D0CF6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_B8A2375227C355F425B9BA0AB9D087FC" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_B8A2375227C355F425B9BA0AB9D087FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_1A07C9FD5EC12867BF74BA0AB9D05929" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_CC3F0E73E09FE7F7F983BA0AB9CF5891" xlink:to="loc_us-gaap_Assets_1A07C9FD5EC12867BF74BA0AB9D05929" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_64EEDF1D0D6767EC177ABA0AB9CFD5ED" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_095373529DA4DA911433BA0AB9D0159D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_095373529DA4DA911433BA0AB9D0159D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_7F6903BA22A5E9F8E39EBA0AB9D03FBE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_095373529DA4DA911433BA0AB9D0159D" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_7F6903BA22A5E9F8E39EBA0AB9D03FBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_51D62EC4040711FFD3F5BA0AB9D09077" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_095373529DA4DA911433BA0AB9D0159D" xlink:to="loc_us-gaap_DeferredRevenueCurrent_51D62EC4040711FFD3F5BA0AB9D09077" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_386B582103921961549DBA0AB9D057B0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_095373529DA4DA911433BA0AB9D0159D" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_386B582103921961549DBA0AB9D057B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtCurrent" xlink:label="loc_us-gaap_DebtCurrent_EAB10C9B9259DAA96063BA0AB9D0A949" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_095373529DA4DA911433BA0AB9D0159D" xlink:to="loc_us-gaap_DebtCurrent_EAB10C9B9259DAA96063BA0AB9D0A949" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_12EBDB17D347F5CF0398BA0AB9D0BDA3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_095373529DA4DA911433BA0AB9D0159D" xlink:to="loc_us-gaap_LiabilitiesCurrent_12EBDB17D347F5CF0398BA0AB9D0BDA3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesCurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesCurrent_C1B0D1C13BB5585D3E45BA0AB9D1941B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesCurrent_C1B0D1C13BB5585D3E45BA0AB9D1941B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_7D8E378E396E10077FC7BA0AB9D163C5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_7D8E378E396E10077FC7BA0AB9D163C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_23751A0423C76DB52FB4BA0AB9D142C8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_23751A0423C76DB52FB4BA0AB9D142C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_F26908B814FE4A07463ABA0AB9D10142" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_F26908B814FE4A07463ABA0AB9D10142" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="loc_us-gaap_DeferredTaxLiabilities_C92C9CB37978CD3D03C9BA0AB9D1EB85" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_DeferredTaxLiabilities_C92C9CB37978CD3D03C9BA0AB9D1EB85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsAmountNoncurrent" xlink:label="loc_us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsAmountNoncurrent_5D95C0C6AD41A86EFF85BA0AB9D170C7" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsAmountNoncurrent_5D95C0C6AD41A86EFF85BA0AB9D170C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_9971529273BF2CF2E639BA0AB9D1FE6A" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_9971529273BF2CF2E639BA0AB9D1FE6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_09E325DCBC2ABDCDB07BBA0AB9D189C8" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_Liabilities_09E325DCBC2ABDCDB07BBA0AB9D189C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_2FE2AA7BA4D121635885BA0AB9D1DD4E" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_CommitmentsAndContingencies_2FE2AA7BA4D121635885BA0AB9D1DD4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_3124C6BE42B1CB25D053BA0AB9D17EA8" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_3124C6BE42B1CB25D053BA0AB9D17EA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_3671DC19E7E2AE7EDFCBBA0AB9D12D52" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_3671DC19E7E2AE7EDFCBBA0AB9D12D52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_5316DB83D6E2B313CD24BA0AB9D1769A" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_PreferredStockValue_5316DB83D6E2B313CD24BA0AB9D1769A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_5F9183AA9AF7AAB983B5BA0AB9D14D8C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:to="loc_us-gaap_CommonStockValue_5F9183AA9AF7AAB983B5BA0AB9D14D8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_F06053035F88097E674CBA0AB9D12423" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:to="loc_us-gaap_AdditionalPaidInCapital_F06053035F88097E674CBA0AB9D12423" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_C4AFF2BF3BFA72ED69EDBA0AB9D1CE68" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_C4AFF2BF3BFA72ED69EDBA0AB9D1CE68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_9B6FF652029D6E9D9BA9BA0AB9D1C040" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_9B6FF652029D6E9D9BA9BA0AB9D1C040" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_418857D5F731E8E5CAFFBA0AB9D12F86" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_9B6FF652029D6E9D9BA9BA0AB9D1C040" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_418857D5F731E8E5CAFFBA0AB9D12F86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_27A1E77A9AFDD0FFFADBBA0AB9D23E6C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_9B6FF652029D6E9D9BA9BA0AB9D1C040" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_27A1E77A9AFDD0FFFADBBA0AB9D23E6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_228420FE82278C1187D0BA0AB9D2E1D6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_9B6FF652029D6E9D9BA9BA0AB9D1C040" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_228420FE82278C1187D0BA0AB9D2E1D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_224CFD0971564610A9FDBA0AB9D2C73A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_9B6FF652029D6E9D9BA9BA0AB9D1C040" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_224CFD0971564610A9FDBA0AB9D2C73A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_5B5BA3F226388ED8F0DABA0AB9D2F4CD" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:to="loc_us-gaap_TreasuryStockValue_5B5BA3F226388ED8F0DABA0AB9D2F4CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_BD4EBCCD59DE64B79755BA0AB9D26043" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:to="loc_us-gaap_StockholdersEquity_BD4EBCCD59DE64B79755BA0AB9D26043" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaap_MinorityInterest_C26EA1CE3022EE131F17BA0AB9D223CA" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:to="loc_us-gaap_MinorityInterest_C26EA1CE3022EE131F17BA0AB9D223CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_8474D4EBCF328AD74CDCBA0AB9D2275E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_77027A8512FA231A154DBA0AB9D1E63A" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_8474D4EBCF328AD74CDCBA0AB9D2275E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_233C59EB5475F3D6E40BBA0AB9D20A66" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_ACE44A2B9A140BDAEAF3BA0AB9D01CA2" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_233C59EB5475F3D6E40BBA0AB9D20A66" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/ConsolidatedBalanceSheetsParentheticals" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_F72AEB7B20A0E68F4EF9BA0AB9A6360D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_StatementTable_F72AEB7B20A0E68F4EF9BA0AB9A6360D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_973A4DCB822EF3E8344CBA0AB9A660A6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_F72AEB7B20A0E68F4EF9BA0AB9A6360D" xlink:to="loc_us-gaap_StatementClassOfStockAxis_973A4DCB822EF3E8344CBA0AB9A660A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_6DA573408E92C051F9B6BA0AB9A60E12_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_973A4DCB822EF3E8344CBA0AB9A660A6" xlink:to="loc_us-gaap_ClassOfStockDomain_6DA573408E92C051F9B6BA0AB9A60E12_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_6DA573408E92C051F9B6BA0AB9A60E12" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_973A4DCB822EF3E8344CBA0AB9A660A6" xlink:to="loc_us-gaap_ClassOfStockDomain_6DA573408E92C051F9B6BA0AB9A60E12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_CF727C13C67637F2561DBA0AB9A673AB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_6DA573408E92C051F9B6BA0AB9A60E12" xlink:to="loc_us-gaap_CommonClassAMember_CF727C13C67637F2561DBA0AB9A673AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_A934D3ABD63C903B34B4BA0AB9A6536C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_6DA573408E92C051F9B6BA0AB9A60E12" xlink:to="loc_us-gaap_CommonClassBMember_A934D3ABD63C903B34B4BA0AB9A6536C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TemporaryEquityParOrStatedValuePerShare" xlink:label="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_D785EBCBC54033CF6D99BA0AB9A65860" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_D785EBCBC54033CF6D99BA0AB9A65860" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TemporaryEquityRedemptionPricePerShare" xlink:label="loc_us-gaap_TemporaryEquityRedemptionPricePerShare_9C065AE6909868B18B84BA0AB9A698C9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_TemporaryEquityRedemptionPricePerShare_9C065AE6909868B18B84BA0AB9A698C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TemporaryEquityLiquidationPreferencePerShare" xlink:label="loc_us-gaap_TemporaryEquityLiquidationPreferencePerShare_E726BED0C140AB57DEB6BA0AB9A6153A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_TemporaryEquityLiquidationPreferencePerShare_E726BED0C140AB57DEB6BA0AB9A6153A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TemporaryEquitySharesAuthorized" xlink:label="loc_us-gaap_TemporaryEquitySharesAuthorized_1E25CAC4596225602AEFBA0AB9A6215C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_TemporaryEquitySharesAuthorized_1E25CAC4596225602AEFBA0AB9A6215C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TemporaryEquitySharesIssued" xlink:label="loc_us-gaap_TemporaryEquitySharesIssued_C2D12FF3EF4E38B5F152BA0AB9A677B8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_TemporaryEquitySharesIssued_C2D12FF3EF4E38B5F152BA0AB9A677B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TemporaryEquitySharesOutstanding" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_9D48D0F4CEE5F73667F1BA0AB9A6B535" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_TemporaryEquitySharesOutstanding_9D48D0F4CEE5F73667F1BA0AB9A6B535" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_D2B17D66F5EC38B5F1F5BA0AB9A6FDB6" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_D2B17D66F5EC38B5F1F5BA0AB9A6FDB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_358CFE51B5A56C1AB37DBA0AB9A6B5F9" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_358CFE51B5A56C1AB37DBA0AB9A6B5F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_1B3A4C99F13548325F42BA0AB9A6084E" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_PreferredStockSharesIssued_1B3A4C99F13548325F42BA0AB9A6084E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_73EB3C6DF8108D3D47DDBA0AB9A6C16C" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_73EB3C6DF8108D3D47DDBA0AB9A6C16C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_6A201AE6B49BC2E96D21BA0AB9A7C9F9" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_6A201AE6B49BC2E96D21BA0AB9A7C9F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_2F0B44124EA584417D33BA0AB9A7E8A6" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_CommonStockSharesIssued_2F0B44124EA584417D33BA0AB9A7E8A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_51C4EE533D4D82795810BA0AB9A7CE18" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_51C4EE533D4D82795810BA0AB9A7CE18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockShares" xlink:label="loc_us-gaap_TreasuryStockShares_5772267F4D3BAB55731BBA0AB9A7B052" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_TreasuryStockShares_5772267F4D3BAB55731BBA0AB9A7B052" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_0C2EC5EE0F302868CAA5BA0AB9A78C10" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_57F2007B5CA12C05FAD6BA0AB9A6FF03" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_0C2EC5EE0F302868CAA5BA0AB9A78C10" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/ConsolidatedStatementsOfChangesInCommonShareholdersEquity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_B054557D83859797C8FFBF3349C58E4A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_4E4A62AA8A92777043B6BF3349C22B72" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_B054557D83859797C8FFBF3349C58E4A" xlink:to="loc_us-gaap_StatementTable_4E4A62AA8A92777043B6BF3349C22B72" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_7CAE4E08477B51C7FD12BF3349C3B80F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_4E4A62AA8A92777043B6BF3349C22B72" xlink:to="loc_us-gaap_StatementClassOfStockAxis_7CAE4E08477B51C7FD12BF3349C3B80F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_5ED5E52772C7777D134CBF3349C342EB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_7CAE4E08477B51C7FD12BF3349C3B80F" xlink:to="loc_us-gaap_ClassOfStockDomain_5ED5E52772C7777D134CBF3349C342EB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_5ED5E52772C7777D134CBF3349C342EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_7CAE4E08477B51C7FD12BF3349C3B80F" xlink:to="loc_us-gaap_ClassOfStockDomain_5ED5E52772C7777D134CBF3349C342EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_296504FB256F42D0A305BF3349C4D3D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_5ED5E52772C7777D134CBF3349C342EB" xlink:to="loc_us-gaap_CommonClassAMember_296504FB256F42D0A305BF3349C4D3D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_5C6818BCF66B0912F2A4BF3349C4F991" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_5ED5E52772C7777D134CBF3349C342EB" xlink:to="loc_us-gaap_CommonClassBMember_5C6818BCF66B0912F2A4BF3349C4F991" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_5E95666732F406B23A68BF3349C40BDB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_4E4A62AA8A92777043B6BF3349C22B72" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_5E95666732F406B23A68BF3349C40BDB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5E95666732F406B23A68BF3349C40BDB" xlink:to="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5E95666732F406B23A68BF3349C40BDB" xlink:to="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_D6D63ED8DF0BEF6C318CBF3349C4B520" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B" xlink:to="loc_us-gaap_CommonStockMember_D6D63ED8DF0BEF6C318CBF3349C4B520" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_EE0A5CD353AA7F4160DABF3349C4E25F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_EE0A5CD353AA7F4160DABF3349C4E25F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_51BCEB7F1F4B833E73FBBF3349C5989E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B" xlink:to="loc_us-gaap_RetainedEarningsMember_51BCEB7F1F4B833E73FBBF3349C5989E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_737C921D46B0B0986678BF3349C5041D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_737C921D46B0B0986678BF3349C5041D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_A8F16C732C93F1626E01BF3349C5996A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B" xlink:to="loc_us-gaap_TreasuryStockMember_A8F16C732C93F1626E01BF3349C5996A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_D9C4957BE429FE187866BF3349C50712" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_8EED2AF83211BE5BC153BF3349C4B68B" xlink:to="loc_us-gaap_NoncontrollingInterestMember_D9C4957BE429FE187866BF3349C50712" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B054557D83859797C8FFBF3349C58E4A" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_993885303DF3CC2C12BBBF3349C53FDA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_993885303DF3CC2C12BBBF3349C53FDA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_C41B3986F831D2969EE4BF3349C5AE2C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_ProfitLoss_C41B3986F831D2969EE4BF3349C5AE2C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EquityEffectofAcquisitionofRedeemableNoncontrollingInterest" xlink:label="loc_ghc_EquityEffectofAcquisitionofRedeemableNoncontrollingInterest_5319CA94A6CDBF98CD92BF3349C552F5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_ghc_EquityEffectofAcquisitionofRedeemableNoncontrollingInterest_5319CA94A6CDBF98CD92BF3349C552F5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ContributionofNoncontrollingInteresttoaJointVenture" xlink:label="loc_ghc_ContributionofNoncontrollingInteresttoaJointVenture_F3FA8F669F02C0CF5A58BF3349C6A282" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_ghc_ContributionofNoncontrollingInteresttoaJointVenture_F3FA8F669F02C0CF5A58BF3349C6A282" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_4398FA09FF6008964F35BF3349C6F944" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_4398FA09FF6008964F35BF3349C6F944" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_58BBC2AA505F3980E22CBF3349C6ED73" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_58BBC2AA505F3980E22CBF3349C6ED73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_003A18F7E9F4668D0A0BBF3349C6F6A1" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_003A18F7E9F4668D0A0BBF3349C6F6A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinorityInterestChangeInRedemptionValue" xlink:label="loc_us-gaap_MinorityInterestChangeInRedemptionValue_85792F011EA241680939BF3349C6459C" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_MinorityInterestChangeInRedemptionValue_85792F011EA241680939BF3349C6459C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DividendsCommonStock" xlink:label="loc_us-gaap_DividendsCommonStock_4CC9A7A5B71CB233B5A5BF3349C68447" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_DividendsCommonStock_4CC9A7A5B71CB233B5A5BF3349C68447" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RedeemablePreferredStockDividends" xlink:label="loc_us-gaap_RedeemablePreferredStockDividends_5381C68033A6E846B4C9BF3349C86723" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_RedeemablePreferredStockDividends_5381C68033A6E846B4C9BF3349C86723" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_160A153B4DA06BCAA1E8BF3349C84542" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_160A153B4DA06BCAA1E8BF3349C84542" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_C05FCF8FAF95402303CCBF3349C904DF" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_C05FCF8FAF95402303CCBF3349C904DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_AD26C244E8A96356045CBF3349C952BF" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_AD26C244E8A96356045CBF3349C952BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_EF9C888D121375831755BF3349C936DB" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_EF9C888D121375831755BF3349C936DB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TaxCutsandJobsAct2017ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarnings" xlink:label="loc_ghc_TaxCutsandJobsAct2017ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarnings_932F83C6CA110A1A2FCFBF3349C96A7E" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_ghc_TaxCutsandJobsAct2017ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarnings_932F83C6CA110A1A2FCFBF3349C96A7E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherComprehensiveIncomeLossNetofTaxNonspinoffrelated" xlink:label="loc_ghc_OtherComprehensiveIncomeLossNetofTaxNonspinoffrelated_9C752C3219C9F8DABBEDBF3349C9B21B" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_ghc_OtherComprehensiveIncomeLossNetofTaxNonspinoffrelated_9C752C3219C9F8DABBEDBF3349C9B21B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_C44FBE17DE910999CE13BF3349C98CDB" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_C44FBE17DE910999CE13BF3349C98CDB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityNoteSpinoffTransaction" xlink:label="loc_us-gaap_StockholdersEquityNoteSpinoffTransaction_D6441BA7B82270484B15BF3349C92301" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_StockholdersEquityNoteSpinoffTransaction_D6441BA7B82270484B15BF3349C92301" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_311D002B9BF26F7F7E14BF3349C9B602" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_311D002B9BF26F7F7E14BF3349C9B602" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_Equityeffectofpurchaseofredeemablenoncontrollinginterest" xlink:label="loc_ghc_Equityeffectofpurchaseofredeemablenoncontrollinginterest_7025FCEAB7CBDFF8EAC6BF3349C9BC87" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_ghc_Equityeffectofpurchaseofredeemablenoncontrollinginterest_7025FCEAB7CBDFF8EAC6BF3349C9BC87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityOther" xlink:label="loc_us-gaap_StockholdersEquityOther_D7F7C472B4779A7DFE65BF3349C906F9" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_us-gaap_StockholdersEquityOther_D7F7C472B4779A7DFE65BF3349C906F9" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ExchangeofRedeemableNoncontrollingInterest" xlink:label="loc_ghc_ExchangeofRedeemableNoncontrollingInterest_E8936C1344AFC386C4A6BF3349C9D0CC" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_593EFEFC26971625ED09BF3349C57B42" xlink:to="loc_ghc_ExchangeofRedeemableNoncontrollingInterest_E8936C1344AFC386C4A6BF3349C9D0CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_AD1AAE6867689DC91035BF3349C9E7E8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B054557D83859797C8FFBF3349C58E4A" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_AD1AAE6867689DC91035BF3349C9E7E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_7B0F79338B0A5B6F2422BF3349CA584B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_AD1AAE6867689DC91035BF3349C9E7E8" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_7B0F79338B0A5B6F2422BF3349CA584B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AcquisitionofRedeemableNoncontrollingInterest" xlink:label="loc_ghc_AcquisitionofRedeemableNoncontrollingInterest_AC04976B0B22CC9BA651BF3349CA0CEF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_AD1AAE6867689DC91035BF3349C9E7E8" xlink:to="loc_ghc_AcquisitionofRedeemableNoncontrollingInterest_AC04976B0B22CC9BA651BF3349CA0CEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TemporaryEquityNetIncome" xlink:label="loc_us-gaap_TemporaryEquityNetIncome_733C68F20423D03E565DBF3349CA52FE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_AD1AAE6867689DC91035BF3349C9E7E8" xlink:to="loc_us-gaap_TemporaryEquityNetIncome_733C68F20423D03E565DBF3349CA52FE" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TemporaryEquityChangeinRedemptionValue" xlink:label="loc_ghc_TemporaryEquityChangeinRedemptionValue_B5978BB70C12515CF586BF3349CA2C1E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_AD1AAE6867689DC91035BF3349C9E7E8" xlink:to="loc_ghc_TemporaryEquityChangeinRedemptionValue_B5978BB70C12515CF586BF3349CA2C1E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TemporaryEquityOtherChanges" xlink:label="loc_us-gaap_TemporaryEquityOtherChanges_37ED69C5DC4C5D997BA8BF3349CA95F4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_AD1AAE6867689DC91035BF3349C9E7E8" xlink:to="loc_us-gaap_TemporaryEquityOtherChanges_37ED69C5DC4C5D997BA8BF3349CA95F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_7BB3BB9C1233CF3DB128BF3349CA33E0" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_AD1AAE6867689DC91035BF3349C9E7E8" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_7BB3BB9C1233CF3DB128BF3349CA33E0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ConversionofRedeemableNoncontrollingInterest" xlink:label="loc_ghc_ConversionofRedeemableNoncontrollingInterest_46C69157C205F8DDFCF3BF3349CADE63" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_AD1AAE6867689DC91035BF3349C9E7E8" xlink:to="loc_ghc_ConversionofRedeemableNoncontrollingInterest_46C69157C205F8DDFCF3BF3349CADE63" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/Contingencies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/ContingenciesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_1F8338933CFC5A83D915BE7169E952D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:to="loc_us-gaap_SubsegmentsAxis_1F8338933CFC5A83D915BE7169E952D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_F4F131CF060DE6A64CD6BE7169E9B2A6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_1F8338933CFC5A83D915BE7169E952D2" xlink:to="loc_us-gaap_SubsegmentsDomain_F4F131CF060DE6A64CD6BE7169E9B2A6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_F4F131CF060DE6A64CD6BE7169E9B2A6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_1F8338933CFC5A83D915BE7169E952D2" xlink:to="loc_us-gaap_SubsegmentsDomain_F4F131CF060DE6A64CD6BE7169E9B2A6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_4E971B4A8FFF64159EE6BE7169E9E107" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_F4F131CF060DE6A64CD6BE7169E9B2A6" xlink:to="loc_ghc_HigherEducationMember_4E971B4A8FFF64159EE6BE7169E9E107" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanInternationalMember" xlink:label="loc_ghc_KaplanInternationalMember_F80F8E86EAB456A2E536BE7169E9213E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_F4F131CF060DE6A64CD6BE7169E9B2A6" xlink:to="loc_ghc_KaplanInternationalMember_F80F8E86EAB456A2E536BE7169E9213E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionAxis" xlink:label="loc_ghc_TransactionAxis_995D37E0385C2E70CE97BE7169E970DD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:to="loc_ghc_TransactionAxis_995D37E0385C2E70CE97BE7169E970DD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_164F10F350F9F3E7C717BE7169E9C36D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TransactionAxis_995D37E0385C2E70CE97BE7169E970DD" xlink:to="loc_ghc_TransactionTypeDomain_164F10F350F9F3E7C717BE7169E9C36D_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_164F10F350F9F3E7C717BE7169E9C36D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TransactionAxis_995D37E0385C2E70CE97BE7169E970DD" xlink:to="loc_ghc_TransactionTypeDomain_164F10F350F9F3E7C717BE7169E9C36D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SaleOfKHECampusesBusinessMember" xlink:label="loc_ghc_SaleOfKHECampusesBusinessMember_217B3C25F4143812AAA6BE7169EEAC27" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_164F10F350F9F3E7C717BE7169E9C36D" xlink:to="loc_ghc_SaleOfKHECampusesBusinessMember_217B3C25F4143812AAA6BE7169EEAC27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_09A31C8EC95A58191785BE7169EEDE3A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_09A31C8EC95A58191785BE7169EEDE3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_1756961AFA3334D55668BE7169EE50F0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_09A31C8EC95A58191785BE7169EEDE3A" xlink:to="loc_us-gaap_SegmentDomain_1756961AFA3334D55668BE7169EE50F0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_1756961AFA3334D55668BE7169EE50F0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_09A31C8EC95A58191785BE7169EEDE3A" xlink:to="loc_us-gaap_SegmentDomain_1756961AFA3334D55668BE7169EE50F0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_54D1142D6C18EAF08D03BE7169EFAF3F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_1756961AFA3334D55668BE7169EE50F0" xlink:to="loc_ghc_EducationMember_54D1142D6C18EAF08D03BE7169EFAF3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_32FF7310AFBCF369AF2ABE7169EF87D0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:to="loc_dei_LegalEntityAxis_32FF7310AFBCF369AF2ABE7169EF87D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_421BD09B62FA581E46E8BE7169EF7844_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_32FF7310AFBCF369AF2ABE7169EF87D0" xlink:to="loc_dei_EntityDomain_421BD09B62FA581E46E8BE7169EF7844_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_421BD09B62FA581E46E8BE7169EF7844" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_32FF7310AFBCF369AF2ABE7169EF87D0" xlink:to="loc_dei_EntityDomain_421BD09B62FA581E46E8BE7169EF7844" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KHEsBroomallPALocationMember" xlink:label="loc_ghc_KHEsBroomallPALocationMember_E4359CD0A3EDB88AFC64BE7169EF5B43" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_421BD09B62FA581E46E8BE7169EF7844" xlink:to="loc_ghc_KHEsBroomallPALocationMember_E4359CD0A3EDB88AFC64BE7169EF5B43" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanUniversityMember" xlink:label="loc_ghc_KaplanUniversityMember_5D435F9AE5ABFCB14818BE7169EFD28B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_421BD09B62FA581E46E8BE7169EF7844" xlink:to="loc_ghc_KaplanUniversityMember_5D435F9AE5ABFCB14818BE7169EFD28B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_UKPathwaysMember" xlink:label="loc_ghc_UKPathwaysMember_5C2AF5F43D248C0F6CF0BE7169F010AF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_421BD09B62FA581E46E8BE7169EF7844" xlink:to="loc_ghc_UKPathwaysMember_5C2AF5F43D248C0F6CF0BE7169F010AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LitigationCaseAxis" xlink:label="loc_us-gaap_LitigationCaseAxis_B210C75999EC9ACEE44FBE7169F0C482" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:to="loc_us-gaap_LitigationCaseAxis_B210C75999EC9ACEE44FBE7169F0C482" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="loc_us-gaap_LitigationCaseTypeDomain_9C3A28A4E0AF59D22E79BE7169F0C789_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationCaseAxis_B210C75999EC9ACEE44FBE7169F0C482" xlink:to="loc_us-gaap_LitigationCaseTypeDomain_9C3A28A4E0AF59D22E79BE7169F0C789_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="loc_us-gaap_LitigationCaseTypeDomain_9C3A28A4E0AF59D22E79BE7169F0C789" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationCaseAxis_B210C75999EC9ACEE44FBE7169F0C482" xlink:to="loc_us-gaap_LitigationCaseTypeDomain_9C3A28A4E0AF59D22E79BE7169F0C789" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_UrquillaDiazAndJajdelskiCasesMember" xlink:label="loc_ghc_UrquillaDiazAndJajdelskiCasesMember_7C856C2FEA6B06F18A58BE7169F0BCE7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationCaseTypeDomain_9C3A28A4E0AF59D22E79BE7169F0C789" xlink:to="loc_ghc_UrquillaDiazAndJajdelskiCasesMember_7C856C2FEA6B06F18A58BE7169F0BCE7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DiazCaseMember" xlink:label="loc_ghc_DiazCaseMember_B1524AF25D38ABC91565BE7169F05CCD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationCaseTypeDomain_9C3A28A4E0AF59D22E79BE7169F0C789" xlink:to="loc_ghc_DiazCaseMember_B1524AF25D38ABC91565BE7169F05CCD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DiazClaimsMember" xlink:label="loc_ghc_DiazClaimsMember_A6F3276A71B7A2A4213ABE7169F0C463" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationCaseTypeDomain_9C3A28A4E0AF59D22E79BE7169F0C789" xlink:to="loc_ghc_DiazClaimsMember_A6F3276A71B7A2A4213ABE7169F0C463" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_JajdelskiCaseMember" xlink:label="loc_ghc_JajdelskiCaseMember_259FDB8F3F50FF31612ABE7169F02F81" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationCaseTypeDomain_9C3A28A4E0AF59D22E79BE7169F0C789" xlink:to="loc_ghc_JajdelskiCaseMember_259FDB8F3F50FF31612ABE7169F02F81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_746AF816C653AF2AB407BE7169F0ED69" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:to="loc_us-gaap_RangeAxis_746AF816C653AF2AB407BE7169F0ED69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_CF7FED99966E63B82C93BE7169F0F4B7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_746AF816C653AF2AB407BE7169F0ED69" xlink:to="loc_us-gaap_RangeMember_CF7FED99966E63B82C93BE7169F0F4B7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_CF7FED99966E63B82C93BE7169F0F4B7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_746AF816C653AF2AB407BE7169F0ED69" xlink:to="loc_us-gaap_RangeMember_CF7FED99966E63B82C93BE7169F0F4B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_FAF964B7BA6ADE27A8A6BE7169F07830" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_CF7FED99966E63B82C93BE7169F0F4B7" xlink:to="loc_us-gaap_MinimumMember_FAF964B7BA6ADE27A8A6BE7169F07830" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_4593C2034DAA650A791DBE7169F18C0C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_CF7FED99966E63B82C93BE7169F0F4B7" xlink:to="loc_us-gaap_MaximumMember_4593C2034DAA650A791DBE7169F18C0C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_5EBF150A118B4394F3F7BE7169F1C852" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_5EBF150A118B4394F3F7BE7169F1C852" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_00D9A5528AE5D0E285F6BE7169F1A135_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_5EBF150A118B4394F3F7BE7169F1C852" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_00D9A5528AE5D0E285F6BE7169F1A135_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_00D9A5528AE5D0E285F6BE7169F1A135" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_5EBF150A118B4394F3F7BE7169F1C852" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_00D9A5528AE5D0E285F6BE7169F1A135" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember" xlink:label="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_520BBADA35AFFCC03AC0BE7169F1AA36" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_00D9A5528AE5D0E285F6BE7169F1A135" xlink:to="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_520BBADA35AFFCC03AC0BE7169F1AA36" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_4F62438564D6B1F9A74ABE7169F1442A" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_BC3493A0BB55DE3DB504BE7169E9528E" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_4F62438564D6B1F9A74ABE7169F1442A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_3873EF8A4BB1995D1A5ABE7169F17EF0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_4F62438564D6B1F9A74ABE7169F1442A" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_3873EF8A4BB1995D1A5ABE7169F17EF0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_3873EF8A4BB1995D1A5ABE7169F17EF0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_4F62438564D6B1F9A74ABE7169F1442A" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_3873EF8A4BB1995D1A5ABE7169F17EF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HerMajestysRevenueAndCustomsHMRCMember" xlink:label="loc_us-gaap_HerMajestysRevenueAndCustomsHMRCMember_508A17C09F6185DE8178BE7169F1E591" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_3873EF8A4BB1995D1A5ABE7169F17EF0" xlink:to="loc_us-gaap_HerMajestysRevenueAndCustomsHMRCMember_508A17C09F6185DE8178BE7169F1E591" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber" xlink:label="loc_us-gaap_LossContingencyPendingClaimsNumber_3ECCBD846D78256AD846BE7169F1FFC1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_us-gaap_LossContingencyPendingClaimsNumber_3ECCBD846D78256AD846BE7169F1FFC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss" xlink:label="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_1120C7536CB29B6332BCBE7169F16611" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_1120C7536CB29B6332BCBE7169F16611" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_9BFE03CCB09661C5EA22BE7169F18981" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_9BFE03CCB09661C5EA22BE7169F18981" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfUnsealedCasesFiledByFormerEmployeesUnderUSFederalFalseClaimsAct" xlink:label="loc_ghc_NumberOfUnsealedCasesFiledByFormerEmployeesUnderUSFederalFalseClaimsAct_0359908A5A8A68CC9A00BE7169F10038" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_NumberOfUnsealedCasesFiledByFormerEmployeesUnderUSFederalFalseClaimsAct_0359908A5A8A68CC9A00BE7169F10038" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SeparateComplaintsIncludedInASeriesOfRulingsOn" xlink:label="loc_ghc_SeparateComplaintsIncludedInASeriesOfRulingsOn_A37B81C4BE909A18D833BE7169F10448" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_SeparateComplaintsIncludedInASeriesOfRulingsOn_A37B81C4BE909A18D833BE7169F10448" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RemainingEmploymentClaimInTheDiazComplaint" xlink:label="loc_ghc_RemainingEmploymentClaimInTheDiazComplaint_677B215EF802337A3C7EBE7169F12532" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_RemainingEmploymentClaimInTheDiazComplaint_677B215EF802337A3C7EBE7169F12532" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfClaimsAffirmedForDismissalbyUSCourtofAppeals" xlink:label="loc_ghc_NumberOfClaimsAffirmedForDismissalbyUSCourtofAppeals_21F06834AF1933739ACFBE7169F16291" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_NumberOfClaimsAffirmedForDismissalbyUSCourtofAppeals_21F06834AF1933739ACFBE7169F16291" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberofClaimsAppealed" xlink:label="loc_ghc_NumberofClaimsAppealed_4284D8D642EC4EF97A34BE7169F2D399" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_NumberofClaimsAppealed_4284D8D642EC4EF97A34BE7169F2D399" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfDismissedAllegationsReversedByTheUSCircuitCourtForTheNinthJudicialCircuit" xlink:label="loc_ghc_NumberOfDismissedAllegationsReversedByTheUSCircuitCourtForTheNinthJudicialCircuit_ECDADAC58B38D6B45638BE7169F2884D" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_NumberOfDismissedAllegationsReversedByTheUSCircuitCourtForTheNinthJudicialCircuit_ECDADAC58B38D6B45638BE7169F2884D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfConditionsOutOfCompliance" xlink:label="loc_ghc_NumberOfConditionsOutOfCompliance_F723D851324471255055BE7169F2C4C1" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_NumberOfConditionsOutOfCompliance_F723D851324471255055BE7169F2C4C1" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfDaysOfNoncompliance" xlink:label="loc_ghc_NumberOfDaysOfNoncompliance_48018306D59A289D085EBE7169F2383E" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_NumberOfDaysOfNoncompliance_48018306D59A289D085EBE7169F2383E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AmountOfPenaltiesPerDayOrPerInstanceOfNoncompliance" xlink:label="loc_ghc_AmountOfPenaltiesPerDayOrPerInstanceOfNoncompliance_29DEAAC20BEF1046C0F3BE7169F20284" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_AmountOfPenaltiesPerDayOrPerInstanceOfNoncompliance_29DEAAC20BEF1046C0F3BE7169F20284" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_9B62269C1D2AA96A52D8BE7169F2DC07" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_9B62269C1D2AA96A52D8BE7169F2DC07" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AmountOfEstimatedUnreturnedTitleIVFundsFromPriorPeriods" xlink:label="loc_ghc_AmountOfEstimatedUnreturnedTitleIVFundsFromPriorPeriods_82F4AD95FA02509DED8FBE7C2FBD77F9" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_AmountOfEstimatedUnreturnedTitleIVFundsFromPriorPeriods_82F4AD95FA02509DED8FBE7C2FBD77F9" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationDivisionRevenueDerivedFromFinancialAidReceivedByStudentsUnderTitleIVPrograms" xlink:label="loc_ghc_EducationDivisionRevenueDerivedFromFinancialAidReceivedByStudentsUnderTitleIVPrograms_9F36C2773AF0886DEDECBE7169F2F82C" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_EducationDivisionRevenueDerivedFromFinancialAidReceivedByStudentsUnderTitleIVPrograms_9F36C2773AF0886DEDECBE7169F2F82C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfPendingProgramReviews" xlink:label="loc_ghc_NumberOfPendingProgramReviews_3BBD9E85DAEE8F1010E1BE7169F22026" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_NumberOfPendingProgramReviews_3BBD9E85DAEE8F1010E1BE7169F22026" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PortionOfRegulationsUnderNinetyTenRule" xlink:label="loc_ghc_PortionOfRegulationsUnderNinetyTenRule_F5FF95F493C54BB591C2BE7169F2DDAA" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_PortionOfRegulationsUnderNinetyTenRule_F5FF95F493C54BB591C2BE7169F2DDAA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PercentageOfReceiptsFromTitleIVPrograms" xlink:label="loc_ghc_PercentageOfReceiptsFromTitleIVPrograms_5437798370B4295B7964BE7169F25A45" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_PercentageOfReceiptsFromTitleIVPrograms_5437798370B4295B7964BE7169F25A45" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PercentageOfReceiptsDerivedFromTitleIV" xlink:label="loc_ghc_PercentageOfReceiptsDerivedFromTitleIV_2258124F36941681F4ECBE7169F26BC7" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_821B767A2B09EE29C1B0BE7169F1F3B0" xlink:to="loc_ghc_PercentageOfReceiptsDerivedFromTitleIV_2258124F36941681F4ECBE7169F26BC7" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/Debt" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/DebtDetails1" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_6A4B171E7757DCF13D58BE9D9FE3D846" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DebtTable" xlink:label="loc_ghc_DebtTable_065C0A2BD15CD76C1686BE9D9FE2083E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6A4B171E7757DCF13D58BE9D9FE3D846" xlink:to="loc_ghc_DebtTable_065C0A2BD15CD76C1686BE9D9FE2083E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_14566A8B4CCCDF58B8EABE9D9FE3F73B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DebtTable_065C0A2BD15CD76C1686BE9D9FE2083E" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_14566A8B4CCCDF58B8EABE9D9FE3F73B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_11F57622A0BA32FC3CEDBE9D9FE3C6C0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_14566A8B4CCCDF58B8EABE9D9FE3F73B" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_11F57622A0BA32FC3CEDBE9D9FE3C6C0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_11F57622A0BA32FC3CEDBE9D9FE3C6C0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_14566A8B4CCCDF58B8EABE9D9FE3F73B" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_11F57622A0BA32FC3CEDBE9D9FE3C6C0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SevenPointTwoFivePercentUnsecuredNotesDueFebruaryOneTwoThousandAndNineteenMember" xlink:label="loc_ghc_SevenPointTwoFivePercentUnsecuredNotesDueFebruaryOneTwoThousandAndNineteenMember_77003B3327BF93ADF162BE9D9FE3AD3F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_11F57622A0BA32FC3CEDBE9D9FE3C6C0" xlink:to="loc_ghc_SevenPointTwoFivePercentUnsecuredNotesDueFebruaryOneTwoThousandAndNineteenMember_77003B3327BF93ADF162BE9D9FE3AD3F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanFourYearCreditAgreementDatedJuly142016Member" xlink:label="loc_ghc_KaplanFourYearCreditAgreementDatedJuly142016Member_520AFE3B5C8B58751D44BE9D9FE34459" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_11F57622A0BA32FC3CEDBE9D9FE3C6C0" xlink:to="loc_ghc_KaplanFourYearCreditAgreementDatedJuly142016Member_520AFE3B5C8B58751D44BE9D9FE34459" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_6C2AD1A26C35BA055186BE9DA4C29FBF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6A4B171E7757DCF13D58BE9D9FE3D846" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_6C2AD1A26C35BA055186BE9DA4C29FBF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredDebt" xlink:label="loc_us-gaap_UnsecuredDebt_97D8209C62BB433441A3BE9D9FE3A8B2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6A4B171E7757DCF13D58BE9D9FE3D846" xlink:to="loc_us-gaap_UnsecuredDebt_97D8209C62BB433441A3BE9D9FE3A8B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_746873F4223C9B9315CEBE9D9FE3DD8D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6A4B171E7757DCF13D58BE9D9FE3D846" xlink:to="loc_us-gaap_LineOfCredit_746873F4223C9B9315CEBE9D9FE3DD8D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherLongTermDebt" xlink:label="loc_us-gaap_OtherLongTermDebt_C556D8661FA5E34D1BC0BE9D9FE47717" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6A4B171E7757DCF13D58BE9D9FE3D846" xlink:to="loc_us-gaap_OtherLongTermDebt_C556D8661FA5E34D1BC0BE9D9FE47717" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_424711E21B569095ECA3BE9D9FE475CB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6A4B171E7757DCF13D58BE9D9FE3D846" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_424711E21B569095ECA3BE9D9FE475CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtCurrent" xlink:label="loc_us-gaap_DebtCurrent_77D225E2B40559BE3A21BE9D9FE486EB" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6A4B171E7757DCF13D58BE9D9FE3D846" xlink:to="loc_us-gaap_DebtCurrent_77D225E2B40559BE3A21BE9D9FE486EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_E8B5098D65BF2265F45DBE9D9FE47C1C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6A4B171E7757DCF13D58BE9D9FE3D846" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_E8B5098D65BF2265F45DBE9D9FE47C1C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/DebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DebtTable" xlink:label="loc_ghc_DebtTable_57A1AEF8371CA34D4CE5BE9D85F5B9EC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_ghc_DebtTable_57A1AEF8371CA34D4CE5BE9D85F5B9EC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis" xlink:label="loc_us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis_03E8C27331FDDA428591BE9D85F55081" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DebtTable_57A1AEF8371CA34D4CE5BE9D85F5B9EC" xlink:to="loc_us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis_03E8C27331FDDA428591BE9D85F55081" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharesSubjectToMandatoryRedemptionFinancialInstrumentDomain" xlink:label="loc_us-gaap_SharesSubjectToMandatoryRedemptionFinancialInstrumentDomain_75189129359AE8C1FDAEBE9D85F5D467_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis_03E8C27331FDDA428591BE9D85F55081" xlink:to="loc_us-gaap_SharesSubjectToMandatoryRedemptionFinancialInstrumentDomain_75189129359AE8C1FDAEBE9D85F5D467_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharesSubjectToMandatoryRedemptionFinancialInstrumentDomain" xlink:label="loc_us-gaap_SharesSubjectToMandatoryRedemptionFinancialInstrumentDomain_75189129359AE8C1FDAEBE9D85F5D467" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis_03E8C27331FDDA428591BE9D85F55081" xlink:to="loc_us-gaap_SharesSubjectToMandatoryRedemptionFinancialInstrumentDomain_75189129359AE8C1FDAEBE9D85F5D467" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecuritiesSubjectToMandatoryRedemptionMember" xlink:label="loc_us-gaap_SecuritiesSubjectToMandatoryRedemptionMember_A90A4FA4B4EF88B1C677BE9D85F5C8E5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharesSubjectToMandatoryRedemptionFinancialInstrumentDomain_75189129359AE8C1FDAEBE9D85F5D467" xlink:to="loc_us-gaap_SecuritiesSubjectToMandatoryRedemptionMember_A90A4FA4B4EF88B1C677BE9D85F5C8E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_08271F24F8B297AF027DBE9D85F6D2B8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DebtTable_57A1AEF8371CA34D4CE5BE9D85F5B9EC" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_08271F24F8B297AF027DBE9D85F6D2B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_02FCC4BB563A6686134DBE9D85F6769D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_08271F24F8B297AF027DBE9D85F6D2B8" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_02FCC4BB563A6686134DBE9D85F6769D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_02FCC4BB563A6686134DBE9D85F6769D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_08271F24F8B297AF027DBE9D85F6D2B8" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_02FCC4BB563A6686134DBE9D85F6769D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_4F83F2CEF73406D02178BE9D85F65113" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_02FCC4BB563A6686134DBE9D85F6769D" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_4F83F2CEF73406D02178BE9D85F65113" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_BE572E15BE01D914EBE1BE9D85F6DEC9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_02FCC4BB563A6686134DBE9D85F6769D" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_BE572E15BE01D914EBE1BE9D85F6DEC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_E0ACC8CDDE2FA1953BC7BE9D85F6232A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_02FCC4BB563A6686134DBE9D85F6769D" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_E0ACC8CDDE2FA1953BC7BE9D85F6232A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionAxis" xlink:label="loc_ghc_TransactionAxis_BA2232AE6E7CF3C90E02BE9D85F60D8D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DebtTable_57A1AEF8371CA34D4CE5BE9D85F5B9EC" xlink:to="loc_ghc_TransactionAxis_BA2232AE6E7CF3C90E02BE9D85F60D8D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_50BCDD3CCD7FFE0F5E7BBE9D85F6F13A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TransactionAxis_BA2232AE6E7CF3C90E02BE9D85F60D8D" xlink:to="loc_ghc_TransactionTypeDomain_50BCDD3CCD7FFE0F5E7BBE9D85F6F13A_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_50BCDD3CCD7FFE0F5E7BBE9D85F6F13A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TransactionAxis_BA2232AE6E7CF3C90E02BE9D85F60D8D" xlink:to="loc_ghc_TransactionTypeDomain_50BCDD3CCD7FFE0F5E7BBE9D85F6F13A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableSpinOffMember" xlink:label="loc_ghc_CableSpinOffMember_462740E1157F14031C7BBE9D85F6E90B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_50BCDD3CCD7FFE0F5E7BBE9D85F6F13A" xlink:to="loc_ghc_CableSpinOffMember_462740E1157F14031C7BBE9D85F6E90B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_74643CBB1F8379056A15BE9D85F66C7C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DebtTable_57A1AEF8371CA34D4CE5BE9D85F5B9EC" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_74643CBB1F8379056A15BE9D85F66C7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_5EB019F9E11ABC6288F7BE9D85F752EA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_74643CBB1F8379056A15BE9D85F66C7C" xlink:to="loc_us-gaap_SegmentDomain_5EB019F9E11ABC6288F7BE9D85F752EA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_5EB019F9E11ABC6288F7BE9D85F752EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_74643CBB1F8379056A15BE9D85F66C7C" xlink:to="loc_us-gaap_SegmentDomain_5EB019F9E11ABC6288F7BE9D85F752EA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_DE8E8A66DC44BA91EAD0BE9D85F71E97" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_5EB019F9E11ABC6288F7BE9D85F752EA" xlink:to="loc_ghc_EducationMember_DE8E8A66DC44BA91EAD0BE9D85F71E97" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableMember" xlink:label="loc_ghc_CableMember_57AFA68F27EE4699E786BE9D85F77218" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_5EB019F9E11ABC6288F7BE9D85F752EA" xlink:to="loc_ghc_CableMember_57AFA68F27EE4699E786BE9D85F77218" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_6DC4E8393BCEF8FF9805BE9D85F722E7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DebtTable_57A1AEF8371CA34D4CE5BE9D85F5B9EC" xlink:to="loc_us-gaap_VariableRateAxis_6DC4E8393BCEF8FF9805BE9D85F722E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_61270F7C514E548FE9CCBE9D85F7A106_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_6DC4E8393BCEF8FF9805BE9D85F722E7" xlink:to="loc_us-gaap_VariableRateDomain_61270F7C514E548FE9CCBE9D85F7A106_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_61270F7C514E548FE9CCBE9D85F7A106" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_6DC4E8393BCEF8FF9805BE9D85F722E7" xlink:to="loc_us-gaap_VariableRateDomain_61270F7C514E548FE9CCBE9D85F7A106" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_C37CFEDF3F23DF0FFFC4BE9D85F790FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_61270F7C514E548FE9CCBE9D85F7A106" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_C37CFEDF3F23DF0FFFC4BE9D85F790FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EurodollarMember" xlink:label="loc_us-gaap_EurodollarMember_104DE587B27F29B6C1A7BE9D85F76216" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_61270F7C514E548FE9CCBE9D85F7A106" xlink:to="loc_us-gaap_EurodollarMember_104DE587B27F29B6C1A7BE9D85F76216" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalFundsEffectiveSwapRateMember" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_79F6B52E803158C3A76EBE9D85F73379" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_61270F7C514E548FE9CCBE9D85F7A106" xlink:to="loc_us-gaap_FederalFundsEffectiveSwapRateMember_79F6B52E803158C3A76EBE9D85F73379" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_F88BD794815304071867BE9D85F73911" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DebtTable_57A1AEF8371CA34D4CE5BE9D85F5B9EC" xlink:to="loc_us-gaap_RangeAxis_F88BD794815304071867BE9D85F73911" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_9A507C32CC30FCE92460BE9D85F76597_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_F88BD794815304071867BE9D85F73911" xlink:to="loc_us-gaap_RangeMember_9A507C32CC30FCE92460BE9D85F76597_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_9A507C32CC30FCE92460BE9D85F76597" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_F88BD794815304071867BE9D85F73911" xlink:to="loc_us-gaap_RangeMember_9A507C32CC30FCE92460BE9D85F76597" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_65C15C00CAFA68D015F5BE9D85F7B370" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_9A507C32CC30FCE92460BE9D85F76597" xlink:to="loc_us-gaap_MinimumMember_65C15C00CAFA68D015F5BE9D85F7B370" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_C21E7E1956082C939DA6BE9D85F7F972" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_9A507C32CC30FCE92460BE9D85F76597" xlink:to="loc_us-gaap_MaximumMember_C21E7E1956082C939DA6BE9D85F7F972" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_4239BE469CBD47706EA5BE9D85F86F6D" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DebtTable_57A1AEF8371CA34D4CE5BE9D85F5B9EC" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_4239BE469CBD47706EA5BE9D85F86F6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4239BE469CBD47706EA5BE9D85F86F6D" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4239BE469CBD47706EA5BE9D85F86F6D" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SevenPointTwoFivePercentUnsecuredNotesDueFebruaryOneTwoThousandAndNineteenMember" xlink:label="loc_ghc_SevenPointTwoFivePercentUnsecuredNotesDueFebruaryOneTwoThousandAndNineteenMember_724A9F1F00F38FD06FE3BE9D85F80FE4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:to="loc_ghc_SevenPointTwoFivePercentUnsecuredNotesDueFebruaryOneTwoThousandAndNineteenMember_724A9F1F00F38FD06FE3BE9D85F80FE4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_FourYearRevolvingCreditAgreementDatedJuneSeventeenthTwoThousandElevenMember" xlink:label="loc_ghc_FourYearRevolvingCreditAgreementDatedJuneSeventeenthTwoThousandElevenMember_C5A51524FD4819C15661BE9D85F82A60" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:to="loc_ghc_FourYearRevolvingCreditAgreementDatedJuneSeventeenthTwoThousandElevenMember_C5A51524FD4819C15661BE9D85F82A60" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_FiveYearRevolvingCreditAgreementDatedJuneTwentynineTwoThousandFifteenMember" xlink:label="loc_ghc_FiveYearRevolvingCreditAgreementDatedJuneTwentynineTwoThousandFifteenMember_7C8030D41E2B0ACA9611BE9D85F8685B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:to="loc_ghc_FiveYearRevolvingCreditAgreementDatedJuneTwentynineTwoThousandFifteenMember_7C8030D41E2B0ACA9611BE9D85F8685B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_FourHundredFiftyMillionUSDollarPortionOfRevolverMember" xlink:label="loc_ghc_FourHundredFiftyMillionUSDollarPortionOfRevolverMember_AD7480D0781EB45BC311BE9D85F82589" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:to="loc_ghc_FourHundredFiftyMillionUSDollarPortionOfRevolverMember_AD7480D0781EB45BC311BE9D85F82589" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_FiftyMillionAustralianDollarPortionOfRevolverMember" xlink:label="loc_ghc_FiftyMillionAustralianDollarPortionOfRevolverMember_C1FD8BD8924CD1304781BE9D85F86C31" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:to="loc_ghc_FiftyMillionAustralianDollarPortionOfRevolverMember_C1FD8BD8924CD1304781BE9D85F86C31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_AF670CE8BF5A97D6958ABE9D85F8E319" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:to="loc_us-gaap_InterestRateSwapMember_AF670CE8BF5A97D6958ABE9D85F8E319" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherIndebtednessMember" xlink:label="loc_ghc_OtherIndebtednessMember_57495A9733DD2CF69BBFBE9D85F9C458" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:to="loc_ghc_OtherIndebtednessMember_57495A9733DD2CF69BBFBE9D85F9C458" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanFourYearCreditAgreementDatedJuly142016Member" xlink:label="loc_ghc_KaplanFourYearCreditAgreementDatedJuly142016Member_2CEED9DC846AE871926DBE9D85F9D34A" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1F6BB3319804A2DCD810BE9D85F80E5E" xlink:to="loc_ghc_KaplanFourYearCreditAgreementDatedJuly142016Member_2CEED9DC846AE871926DBE9D85F9D34A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_A1F9FDCBB61A69BA26D2BE9D8B0CD708" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_A1F9FDCBB61A69BA26D2BE9D8B0CD708" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_9BD4F70167D7F27CBC4EBE9D85F91230" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_9BD4F70167D7F27CBC4EBE9D85F91230" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentMaturityDateRangeStart1" xlink:label="loc_us-gaap_DebtInstrumentMaturityDateRangeStart1_51C986358025608E5D12BE9D85F94C81" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentMaturityDateRangeStart1_51C986358025608E5D12BE9D85F94C81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentMaturityDateRangeEnd1" xlink:label="loc_us-gaap_DebtInstrumentMaturityDateRangeEnd1_D71ECC3C679DD8E50AB6BE9D85F91C8F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentMaturityDateRangeEnd1_D71ECC3C679DD8E50AB6BE9D85F91C8F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_5097936C2343EED774E4BE9D85F93B64" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_5097936C2343EED774E4BE9D85F93B64" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DebtInstrumentCovenantLeverageRatioMaximum" xlink:label="loc_ghc_DebtInstrumentCovenantLeverageRatioMaximum_E5E627DC5B8F52EF3D47BE9D85F99463" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_ghc_DebtInstrumentCovenantLeverageRatioMaximum_E5E627DC5B8F52EF3D47BE9D85F99463" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DebtInstrumentCovenantInterestCoverageRatioMinimum" xlink:label="loc_ghc_DebtInstrumentCovenantInterestCoverageRatioMinimum_05A53F0F17E7E9C62627BE9D85F977CB" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_ghc_DebtInstrumentCovenantInterestCoverageRatioMinimum_05A53F0F17E7E9C62627BE9D85F977CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_E2D9DFD7C0F8FDFF853ABE9D85F93B82" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_LineOfCredit_E2D9DFD7C0F8FDFF853ABE9D85F93B82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_D4C413F0F845B6918BA4BE9D85F9BD70" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_invest_DerivativeNotionalAmount_D4C413F0F845B6918BA4BE9D85F9BD70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeFixedInterestRate" xlink:label="loc_us-gaap_DerivativeFixedInterestRate_39EDD8DF832DE6B88AECBE9D85FA5DD5" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DerivativeFixedInterestRate_39EDD8DF832DE6B88AECBE9D85FA5DD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtPercentageBearingFixedInterestRate" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_0453F8ACB100ED61C70DBE9D85FA159B" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_0453F8ACB100ED61C70DBE9D85FA159B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_BA32BAA4CD778C808EFEBE9D85FA5570" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_BA32BAA4CD778C808EFEBE9D85FA5570" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_D8C52208A177E2386F67BE9D85FACE88" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_D8C52208A177E2386F67BE9D85FACE88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaap_DebtInstrumentMaturityDate_20A189010ACC9D65B75ABE9D85FAD335" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentMaturityDate_20A189010ACC9D65B75ABE9D85FAD335" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NotesRepurchasePercentageOfPrincipalAmountToBeEligibleForRedemption" xlink:label="loc_ghc_NotesRepurchasePercentageOfPrincipalAmountToBeEligibleForRedemption_863AADDC781064CDBD3DBE9D85FA4316" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_ghc_NotesRepurchasePercentageOfPrincipalAmountToBeEligibleForRedemption_863AADDC781064CDBD3DBE9D85FA4316" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_EEAAE4F4F9DC5CBC0839BE9D85FA8E34" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_EEAAE4F4F9DC5CBC0839BE9D85FA8E34" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_6A535778D99E039CADE7BE9D85FA0B5A" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_6A535778D99E039CADE7BE9D85FA0B5A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AverageOutstandingDebtAmount" xlink:label="loc_ghc_AverageOutstandingDebtAmount_112E8AB0244C59E96BA6BE9D85FA5B4A" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_ghc_AverageOutstandingDebtAmount_112E8AB0244C59E96BA6BE9D85FA5B4A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_7B28562D195CBCF5A301BE9D85FA53D5" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_7B28562D195CBCF5A301BE9D85FA53D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpenseDebt" xlink:label="loc_us-gaap_InterestExpenseDebt_7B23D9D96E542F8ED975BE9D85FA7188" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_InterestExpenseDebt_7B23D9D96E542F8ED975BE9D85FA7188" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_3F17EE8604FC63FCBAAABE9D85FB7FA1" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_InvestmentIncomeInterest_3F17EE8604FC63FCBAAABE9D85FB7FA1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_387B04C40131E3F2B034BE9D85FB84CE" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_InterestExpense_387B04C40131E3F2B034BE9D85FB84CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="loc_us-gaap_DebtInstrumentFairValue_268FCDD9C357F7D3147FBE9D85FBE45E" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentFairValue_268FCDD9C357F7D3147FBE9D85FBE45E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredDebt" xlink:label="loc_us-gaap_UnsecuredDebt_2347DD17528890177783BE9D85FBE6FA" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_UnsecuredDebt_2347DD17528890177783BE9D85FBE6FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:label="loc_us-gaap_DebtInstrumentTerm_F28F1AAE09C001D66DAEBE9D85FB8C5B" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_DebtInstrumentTerm_F28F1AAE09C001D66DAEBE9D85FB8C5B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypesOfInterestRateDerivativesUsed" xlink:label="loc_us-gaap_TypesOfInterestRateDerivativesUsed_BBF5B4BA2709D32D12AEBE9D85FB7CA4" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_TypesOfInterestRateDerivativesUsed_BBF5B4BA2709D32D12AEBE9D85FB7CA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfLinesOfCredit_8096E9716BAA13889454BE9D85FB9FFF" xlink:type="locator" />
    <link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfLinesOfCredit_8096E9716BAA13889454BE9D85FB9FFF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NotionalAmountOfDerivativeMatured" xlink:label="loc_ghc_NotionalAmountOfDerivativeMatured_DA12DC98B2140A1D1B18BE9D85FB01D6" xlink:type="locator" />
    <link:definitionArc order="28" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_ghc_NotionalAmountOfDerivativeMatured_DA12DC98B2140A1D1B18BE9D85FB01D6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TerminationOfCreditAgreement" xlink:label="loc_ghc_TerminationOfCreditAgreement_C5541B9CC1C76BB375FFBE9D85FB0093" xlink:type="locator" />
    <link:definitionArc order="29" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3BB3EA73486A0F8AB909BE9D85F96612" xlink:to="loc_ghc_TerminationOfCreditAgreement_C5541B9CC1C76BB375FFBE9D85FB0093" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/DebtTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/DiscontinuedOperations" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/DiscontinuedOperationsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_6FF09D799129E65D47FFBA0AB901F4DA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_StatementClassOfStockAxis_6FF09D799129E65D47FFBA0AB901F4DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_C00C6945B8EE7D388D0DBA0AB9022603_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6FF09D799129E65D47FFBA0AB901F4DA" xlink:to="loc_us-gaap_ClassOfStockDomain_C00C6945B8EE7D388D0DBA0AB9022603_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_C00C6945B8EE7D388D0DBA0AB9022603" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6FF09D799129E65D47FFBA0AB901F4DA" xlink:to="loc_us-gaap_ClassOfStockDomain_C00C6945B8EE7D388D0DBA0AB9022603" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_CD46C073B80AA9DBE308BA0AB902B730" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_C00C6945B8EE7D388D0DBA0AB9022603" xlink:to="loc_us-gaap_CommonClassBMember_CD46C073B80AA9DBE308BA0AB902B730" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_9FE30A1DC63E4B4E0090BA0AB9021006" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_SubsegmentsAxis_9FE30A1DC63E4B4E0090BA0AB9021006" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_BE3BA58080D135F133F6BA0AB902FF44_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_9FE30A1DC63E4B4E0090BA0AB9021006" xlink:to="loc_us-gaap_SubsegmentsDomain_BE3BA58080D135F133F6BA0AB902FF44_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_BE3BA58080D135F133F6BA0AB902FF44" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_9FE30A1DC63E4B4E0090BA0AB9021006" xlink:to="loc_us-gaap_SubsegmentsDomain_BE3BA58080D135F133F6BA0AB902FF44" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanInternationalMember" xlink:label="loc_ghc_KaplanInternationalMember_E2CA1066CDFF0EEE093ABA0AB90295C9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_BE3BA58080D135F133F6BA0AB902FF44" xlink:to="loc_ghc_KaplanInternationalMember_E2CA1066CDFF0EEE093ABA0AB90295C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_C88D8C06C7E829326200BA0AB902149A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_C88D8C06C7E829326200BA0AB902149A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_583BAC7D906A0B3BD4DABA0AB902543F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_C88D8C06C7E829326200BA0AB902149A" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_583BAC7D906A0B3BD4DABA0AB902543F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_583BAC7D906A0B3BD4DABA0AB902543F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_C88D8C06C7E829326200BA0AB902149A" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_583BAC7D906A0B3BD4DABA0AB902543F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_FA2957CEDDF7F73F50E7BA0AB9027B12" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_583BAC7D906A0B3BD4DABA0AB902543F" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_FA2957CEDDF7F73F50E7BA0AB9027B12" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SpinoffStockCompensationExpensePeriodAxis" xlink:label="loc_ghc_SpinoffStockCompensationExpensePeriodAxis_BD58A73A92A868698375BA0AB9020AAA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_ghc_SpinoffStockCompensationExpensePeriodAxis_BD58A73A92A868698375BA0AB9020AAA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SpinoffStockCompensationExpensePeriodDomain" xlink:label="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_7777CBD5C93EEF5C060BBA0AB902E0C2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_SpinoffStockCompensationExpensePeriodAxis_BD58A73A92A868698375BA0AB9020AAA" xlink:to="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_7777CBD5C93EEF5C060BBA0AB902E0C2_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SpinoffStockCompensationExpensePeriodDomain" xlink:label="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_7777CBD5C93EEF5C060BBA0AB902E0C2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_SpinoffStockCompensationExpensePeriodAxis_BD58A73A92A868698375BA0AB9020AAA" xlink:to="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_7777CBD5C93EEF5C060BBA0AB902E0C2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_Q32015Member" xlink:label="loc_ghc_Q32015Member_04F3FC78E2D741EC9436BA0AB90272A2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_7777CBD5C93EEF5C060BBA0AB902E0C2" xlink:to="loc_ghc_Q32015Member_04F3FC78E2D741EC9436BA0AB90272A2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_July2015throughDecember2018Member" xlink:label="loc_ghc_July2015throughDecember2018Member_D0E43C182A7C2A7C08C0BA0AB9028DF8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SpinoffStockCompensationExpensePeriodDomain_7777CBD5C93EEF5C060BBA0AB902E0C2" xlink:to="loc_ghc_July2015throughDecember2018Member_D0E43C182A7C2A7C08C0BA0AB9028DF8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_A7F7BF15881BA2113AC6BA0AB902CEE8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_A7F7BF15881BA2113AC6BA0AB902CEE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_643293EF8C108F6D5280BA0AB9023108_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_A7F7BF15881BA2113AC6BA0AB902CEE8" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_643293EF8C108F6D5280BA0AB9023108_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_643293EF8C108F6D5280BA0AB9023108" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_A7F7BF15881BA2113AC6BA0AB902CEE8" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_643293EF8C108F6D5280BA0AB9023108" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_E63D38646EF37A1ED4C5BA0AB9034E4B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_643293EF8C108F6D5280BA0AB9023108" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_E63D38646EF37A1ED4C5BA0AB9034E4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_E0FC014A3AD32B834083BA0AB90325BB" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_AwardTypeAxis_E0FC014A3AD32B834083BA0AB90325BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48C5C577AE871D646F14BA0AB90393D4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_E0FC014A3AD32B834083BA0AB90325BB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48C5C577AE871D646F14BA0AB90393D4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48C5C577AE871D646F14BA0AB90393D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_E0FC014A3AD32B834083BA0AB90325BB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48C5C577AE871D646F14BA0AB90393D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_8518E7DFB2937093D13BBA0AB90318BF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48C5C577AE871D646F14BA0AB90393D4" xlink:to="loc_us-gaap_EmployeeStockOptionMember_8518E7DFB2937093D13BBA0AB90318BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_BF560752475BC6F6EBBCBA0AB9033E33" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48C5C577AE871D646F14BA0AB90393D4" xlink:to="loc_us-gaap_RestrictedStockMember_BF560752475BC6F6EBBCBA0AB9033E33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOperatingActivitiesSegmentAxis" xlink:label="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_DB5BB10674300091D326BA0AB9033F3E" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_DB5BB10674300091D326BA0AB9033F3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_16EB53D0813888D89061BA0AB9036F33_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_DB5BB10674300091D326BA0AB9033F3E" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_16EB53D0813888D89061BA0AB9036F33_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_16EB53D0813888D89061BA0AB9036F33" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_DB5BB10674300091D326BA0AB9033F3E" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_16EB53D0813888D89061BA0AB9036F33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="loc_us-gaap_SegmentDiscontinuedOperationsMember_FB651740B5BA0817F5C5BA0AB9038223" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentOperatingActivitiesDomain_16EB53D0813888D89061BA0AB9036F33" xlink:to="loc_us-gaap_SegmentDiscontinuedOperationsMember_FB651740B5BA0817F5C5BA0AB9038223" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionAxis" xlink:label="loc_ghc_TransactionAxis_648D9D0FE405E9AFB2E0BA0AB903095B" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_ghc_TransactionAxis_648D9D0FE405E9AFB2E0BA0AB903095B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_8506F601CDF23DE94CFEBA0AB903AC39_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TransactionAxis_648D9D0FE405E9AFB2E0BA0AB903095B" xlink:to="loc_ghc_TransactionTypeDomain_8506F601CDF23DE94CFEBA0AB903AC39_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_8506F601CDF23DE94CFEBA0AB903AC39" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TransactionAxis_648D9D0FE405E9AFB2E0BA0AB903095B" xlink:to="loc_ghc_TransactionTypeDomain_8506F601CDF23DE94CFEBA0AB903AC39" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableSpinOffMember" xlink:label="loc_ghc_CableSpinOffMember_0F0BC17D8501435A3FFBBA0AB903C2C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_8506F601CDF23DE94CFEBA0AB903AC39" xlink:to="loc_ghc_CableSpinOffMember_0F0BC17D8501435A3FFBBA0AB903C2C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_63B82825399C750A88FCBA0AB903C276" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_8506F601CDF23DE94CFEBA0AB903AC39" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_63B82825399C750A88FCBA0AB903C276" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SaleOfPublishingSubsidiariesMember" xlink:label="loc_ghc_SaleOfPublishingSubsidiariesMember_B9FC04335CEA4CFC2879BA0AB903D4B7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_8506F601CDF23DE94CFEBA0AB903AC39" xlink:to="loc_ghc_SaleOfPublishingSubsidiariesMember_B9FC04335CEA4CFC2879BA0AB903D4B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_1DF344541EF04FE4CDA7BA0AB9034D52" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_1DF344541EF04FE4CDA7BA0AB9034D52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9161F75252B95019A3BBBA0AB903F530_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_1DF344541EF04FE4CDA7BA0AB9034D52" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9161F75252B95019A3BBBA0AB903F530_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9161F75252B95019A3BBBA0AB903F530" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_1DF344541EF04FE4CDA7BA0AB9034D52" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9161F75252B95019A3BBBA0AB903F530" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SaleOfPublishingSubsidiariesMember" xlink:label="loc_ghc_SaleOfPublishingSubsidiariesMember_8EC8ECC7C2C5CEF46668BA0AB903B065" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9161F75252B95019A3BBBA0AB903F530" xlink:to="loc_ghc_SaleOfPublishingSubsidiariesMember_8EC8ECC7C2C5CEF46668BA0AB903B065" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_463EC87F9D53B0B6A44DBA0AB90390E1" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_dei_LegalEntityAxis_463EC87F9D53B0B6A44DBA0AB90390E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_199937A8846B1F08E1B5BA0AB903A6C7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_463EC87F9D53B0B6A44DBA0AB90390E1" xlink:to="loc_dei_EntityDomain_199937A8846B1F08E1B5BA0AB903A6C7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_199937A8846B1F08E1B5BA0AB903A6C7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_463EC87F9D53B0B6A44DBA0AB90390E1" xlink:to="loc_dei_EntityDomain_199937A8846B1F08E1B5BA0AB903A6C7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanChinaMember" xlink:label="loc_ghc_KaplanChinaMember_923651C5B5D5851DF0F0BA0AB904203B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_199937A8846B1F08E1B5BA0AB903A6C7" xlink:to="loc_ghc_KaplanChinaMember_923651C5B5D5851DF0F0BA0AB904203B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_WPLGMember" xlink:label="loc_ghc_WPLGMember_4205DCD1C1D0EDF71FA3BA0AB90452AE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_199937A8846B1F08E1B5BA0AB903A6C7" xlink:to="loc_ghc_WPLGMember_4205DCD1C1D0EDF71FA3BA0AB90452AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_58616534A1482CAE7C43BA0AB9047610" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_StatementScenarioAxis_58616534A1482CAE7C43BA0AB9047610" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_005902FE58FB8335AB70BA0AB9049F5F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_58616534A1482CAE7C43BA0AB9047610" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_005902FE58FB8335AB70BA0AB9049F5F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_005902FE58FB8335AB70BA0AB9049F5F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_58616534A1482CAE7C43BA0AB9047610" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_005902FE58FB8335AB70BA0AB9049F5F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableSpinOffMember" xlink:label="loc_ghc_CableSpinOffMember_B4A4D7A2D5F26D25AEE3BA0AB904D347" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_005902FE58FB8335AB70BA0AB9049F5F" xlink:to="loc_ghc_CableSpinOffMember_B4A4D7A2D5F26D25AEE3BA0AB904D347" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_ED118B8EECA98EAEDCA1BA0AB904D4BF" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_ED118B8EECA98EAEDCA1BA0AB904D4BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C56933094D4586CDA264BA0AB904D237_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ED118B8EECA98EAEDCA1BA0AB904D4BF" xlink:to="loc_us-gaap_SegmentDomain_C56933094D4586CDA264BA0AB904D237_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C56933094D4586CDA264BA0AB904D237" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ED118B8EECA98EAEDCA1BA0AB904D4BF" xlink:to="loc_us-gaap_SegmentDomain_C56933094D4586CDA264BA0AB904D237" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableMember" xlink:label="loc_ghc_CableMember_6A87D505931853448F1CBA0AB9045F9A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C56933094D4586CDA264BA0AB904D237" xlink:to="loc_ghc_CableMember_6A87D505931853448F1CBA0AB9045F9A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanInternationalMember" xlink:label="loc_ghc_KaplanInternationalMember_BF8672B6525E2FFEA740BA0AB904063D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C56933094D4586CDA264BA0AB904D237" xlink:to="loc_ghc_KaplanInternationalMember_BF8672B6525E2FFEA740BA0AB904063D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_DEF307CEADC17E4DB64ABA0AB904A2BE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C56933094D4586CDA264BA0AB904D237" xlink:to="loc_ghc_EducationMember_DEF307CEADC17E4DB64ABA0AB904A2BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="loc_us-gaap_ConsolidationItemsAxis_3D1C11713994E3775C2EBA0AB9041E03" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_A89AFD43C07A3C83C745BA0AB901071C" xlink:to="loc_us-gaap_ConsolidationItemsAxis_3D1C11713994E3775C2EBA0AB9041E03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_F695C784A849D9B2CDF1BA0AB904EBC9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidationItemsAxis_3D1C11713994E3775C2EBA0AB9041E03" xlink:to="loc_us-gaap_ConsolidationItemsDomain_F695C784A849D9B2CDF1BA0AB904EBC9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_F695C784A849D9B2CDF1BA0AB904EBC9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidationItemsAxis_3D1C11713994E3775C2EBA0AB9041E03" xlink:to="loc_us-gaap_ConsolidationItemsDomain_F695C784A849D9B2CDF1BA0AB904EBC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_BDD997300AE2800F919EBA0AB9044FA6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_F695C784A849D9B2CDF1BA0AB904EBC9" xlink:to="loc_us-gaap_CorporateNonSegmentMember_BDD997300AE2800F919EBA0AB9044FA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromContributionsFromAffiliates" xlink:label="loc_us-gaap_ProceedsFromContributionsFromAffiliates_A8217AAAE1DB72BA7E4ABA0AB904DB12" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_ProceedsFromContributionsFromAffiliates_A8217AAAE1DB72BA7E4ABA0AB904DB12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_3213D2AD43C07A0DAFFEBA0AB9057D9E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_3213D2AD43C07A0DAFFEBA0AB9057D9E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SharebasedCompensationArrangementbySharebasedPaymentAwardPlanModificationNumberOfShares" xlink:label="loc_ghc_SharebasedCompensationArrangementbySharebasedPaymentAwardPlanModificationNumberOfShares_433F8FD6738CF4DE2945BA0AB905E92B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_ghc_SharebasedCompensationArrangementbySharebasedPaymentAwardPlanModificationNumberOfShares_433F8FD6738CF4DE2945BA0AB905E92B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected_9C6389B1824DD292BB1BBA0AB9051A2C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected_9C6389B1824DD292BB1BBA0AB9051A2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber_C7D4BE71F319585A12A6BA0AB905CF90" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber_C7D4BE71F319585A12A6BA0AB905CF90" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_078C4755B6E1B8C27986BA0AB905FD6A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_078C4755B6E1B8C27986BA0AB905FD6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_A6AC1C361CA3E4DED3FEBA0AB905B27C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_A6AC1C361CA3E4DED3FEBA0AB905B27C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_F1A253A94F5C9FFACECEBA0AB9059826" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_F1A253A94F5C9FFACECEBA0AB9059826" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationAssetsLiabilitiesNet" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationAssetsLiabilitiesNet_6F73A4CA756E47C763B6BA0AB9050E67" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationAssetsLiabilitiesNet_6F73A4CA756E47C763B6BA0AB9050E67" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationsNetAssetsNetofCash" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsNetAssetsNetofCash_CCCF93E8CBDEC4E1506ABA0AB9059A8E" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsNetAssetsNetofCash_CCCF93E8CBDEC4E1506ABA0AB9059A8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations" xlink:label="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_DE6FE8FF408D15AF0DB3BA0AB90589F2" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_DE6FE8FF408D15AF0DB3BA0AB90589F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations" xlink:label="loc_us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_AC03CEF1FAF627DC69C6BA0AB905B5D6" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_AC03CEF1FAF627DC69C6BA0AB905B5D6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SpinoffCosts" xlink:label="loc_ghc_SpinoffCosts_5D0DFB8180AF1EE2547EBA0AB905854E" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_ghc_SpinoffCosts_5D0DFB8180AF1EE2547EBA0AB905854E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfSchoolsSold" xlink:label="loc_ghc_NumberOfSchoolsSold_41D26670DBFDEC02F2BABA0AB905DA0E" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_ghc_NumberOfSchoolsSold_41D26670DBFDEC02F2BABA0AB905DA0E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_6F1730BAB3F4BA9BAEC0BA0AB9054AC1" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_6F1730BAB3F4BA9BAEC0BA0AB9054AC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_A62E6162A032AB6C0A93BA0AB905FC8B" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_E699002D4B2255ACF7BABA0AB90421A4" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_A62E6162A032AB6C0A93BA0AB905FC8B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/DiscontinuedOperationsSummarizedIncomeLossFromDiscontinuedOperationsNetOfTaxDetails3" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_674269049EA360DBBBE3BA0AB8E70E8F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_2F47C68E840B67BA2699BA0AB8E66280" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_674269049EA360DBBBE3BA0AB8E70E8F" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_2F47C68E840B67BA2699BA0AB8E66280" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_F87B81333F94A9FD545DBA0AB8E7AAD3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_2F47C68E840B67BA2699BA0AB8E66280" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_F87B81333F94A9FD545DBA0AB8E7AAD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_58FFD89E5243689805F7BA0AB8E793AB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_F87B81333F94A9FD545DBA0AB8E7AAD3" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_58FFD89E5243689805F7BA0AB8E793AB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_58FFD89E5243689805F7BA0AB8E793AB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_F87B81333F94A9FD545DBA0AB8E7AAD3" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_58FFD89E5243689805F7BA0AB8E793AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_DC2559D59669A6C2DE34BA0AB8E79016" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_2F47C68E840B67BA2699BA0AB8E66280" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_DC2559D59669A6C2DE34BA0AB8E79016" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_8D756F6B11A94623B4C3BA0AB8E7E04E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_DC2559D59669A6C2DE34BA0AB8E79016" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_8D756F6B11A94623B4C3BA0AB8E7E04E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_8D756F6B11A94623B4C3BA0AB8E7E04E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_DC2559D59669A6C2DE34BA0AB8E79016" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_8D756F6B11A94623B4C3BA0AB8E7E04E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_65AD8ADE546CB937E4DDBA0AB8E7F7F5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_2F47C68E840B67BA2699BA0AB8E66280" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_65AD8ADE546CB937E4DDBA0AB8E7F7F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_00754FD2A3B26DF6DD9EBA0AB8E75458_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_65AD8ADE546CB937E4DDBA0AB8E7F7F5" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_00754FD2A3B26DF6DD9EBA0AB8E75458_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_00754FD2A3B26DF6DD9EBA0AB8E75458" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_65AD8ADE546CB937E4DDBA0AB8E7F7F5" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_00754FD2A3B26DF6DD9EBA0AB8E75458" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/DiscontinuedOperationsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_ABD6684D774281E907DBBA0AB90AE5D0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0C9B54C4F8424F3B6E7DBA0AB90A4DE1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_ABD6684D774281E907DBBA0AB90AE5D0" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0C9B54C4F8424F3B6E7DBA0AB90A4DE1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionAxis" xlink:label="loc_ghc_TransactionAxis_F492EEBEC0BF666C31E3BA0AB90A6A2F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0C9B54C4F8424F3B6E7DBA0AB90A4DE1" xlink:to="loc_ghc_TransactionAxis_F492EEBEC0BF666C31E3BA0AB90A6A2F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_9F03A2F1DFA08E9990FCBA0AB90A5794_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TransactionAxis_F492EEBEC0BF666C31E3BA0AB90A6A2F" xlink:to="loc_ghc_TransactionTypeDomain_9F03A2F1DFA08E9990FCBA0AB90A5794_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_9F03A2F1DFA08E9990FCBA0AB90A5794" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TransactionAxis_F492EEBEC0BF666C31E3BA0AB90A6A2F" xlink:to="loc_ghc_TransactionTypeDomain_9F03A2F1DFA08E9990FCBA0AB90A5794" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableSpinOffMember" xlink:label="loc_ghc_CableSpinOffMember_DE7335DE76E531787C33BA0AB90A4AAB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_9F03A2F1DFA08E9990FCBA0AB90A5794" xlink:to="loc_ghc_CableSpinOffMember_DE7335DE76E531787C33BA0AB90A4AAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_97B9AF5D17B330643B0ABA0AB90A3757" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0C9B54C4F8424F3B6E7DBA0AB90A4DE1" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_97B9AF5D17B330643B0ABA0AB90A3757" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7CA931469AAEB5A70063BA0AB90A5002_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_97B9AF5D17B330643B0ABA0AB90A3757" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7CA931469AAEB5A70063BA0AB90A5002_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7CA931469AAEB5A70063BA0AB90A5002" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_97B9AF5D17B330643B0ABA0AB90A3757" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7CA931469AAEB5A70063BA0AB90A5002" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableSpinOffMember" xlink:label="loc_ghc_CableSpinOffMember_6479C136241466644287BA0AB90A6FAD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7CA931469AAEB5A70063BA0AB90A5002" xlink:to="loc_ghc_CableSpinOffMember_6479C136241466644287BA0AB90A6FAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_F9A6FF6230B7E26BD809BA0AB90A4D47" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0C9B54C4F8424F3B6E7DBA0AB90A4DE1" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_F9A6FF6230B7E26BD809BA0AB90A4D47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_A58F1B72FAA739BAFD43BA0AB90AEEEA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_F9A6FF6230B7E26BD809BA0AB90A4D47" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_A58F1B72FAA739BAFD43BA0AB90AEEEA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_A58F1B72FAA739BAFD43BA0AB90AEEEA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_F9A6FF6230B7E26BD809BA0AB90A4D47" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_A58F1B72FAA739BAFD43BA0AB90AEEEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_1FF03F195B6E58391BEFBA0AB90A16B8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_0C9B54C4F8424F3B6E7DBA0AB90A4DE1" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_1FF03F195B6E58391BEFBA0AB90A16B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_2638CDBE8A62AEDEF8E6BA0AB90ADE18_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_1FF03F195B6E58391BEFBA0AB90A16B8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_2638CDBE8A62AEDEF8E6BA0AB90ADE18_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_2638CDBE8A62AEDEF8E6BA0AB90ADE18" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_1FF03F195B6E58391BEFBA0AB90A16B8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_2638CDBE8A62AEDEF8E6BA0AB90ADE18" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupsIncludingDiscontinuedOperationsCashFlowsTableTextBlock" xlink:label="loc_ghc_DisposalGroupsIncludingDiscontinuedOperationsCashFlowsTableTextBlock_446AE2D67997F8D814ABBA0AB90BA0A7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_ABD6684D774281E907DBBA0AB90AE5D0" xlink:to="loc_ghc_DisposalGroupsIncludingDiscontinuedOperationsCashFlowsTableTextBlock_446AE2D67997F8D814ABBA0AB90BA0A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock" xlink:label="loc_us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_5EDB92B74AE395A302D0BA0AB90B5FA5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_ABD6684D774281E907DBBA0AB90AE5D0" xlink:to="loc_us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_5EDB92B74AE395A302D0BA0AB90B5FA5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/DisontinuedOperationsCarryingAmountOfAssetsAndLiabilitiesIncludedInDiscontinuedOperationsDetails1" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_F5EE57CFEA9286B169E4BA0AB8F4189C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_F5EE57CFEA9286B169E4BA0AB8F4189C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_CEC01338F5B914277E2ABA0AB8F4F238" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_F5EE57CFEA9286B169E4BA0AB8F4189C" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_CEC01338F5B914277E2ABA0AB8F4F238" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_994B582DD127D3B07315BA0AB8F4C6E2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_CEC01338F5B914277E2ABA0AB8F4F238" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_994B582DD127D3B07315BA0AB8F4C6E2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_994B582DD127D3B07315BA0AB8F4C6E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_CEC01338F5B914277E2ABA0AB8F4F238" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_994B582DD127D3B07315BA0AB8F4C6E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_7079AA16858E76395AB3BA0AB8F46D0A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_F5EE57CFEA9286B169E4BA0AB8F4189C" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_7079AA16858E76395AB3BA0AB8F46D0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_44133DC8ED3E3CBD9F8CBA0AB8F467AB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_7079AA16858E76395AB3BA0AB8F46D0A" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_44133DC8ED3E3CBD9F8CBA0AB8F467AB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_44133DC8ED3E3CBD9F8CBA0AB8F467AB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_7079AA16858E76395AB3BA0AB8F46D0A" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_44133DC8ED3E3CBD9F8CBA0AB8F467AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_A22F033DD680317DB4C7BA0AB8F4DEBA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_44133DC8ED3E3CBD9F8CBA0AB8F467AB" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_A22F033DD680317DB4C7BA0AB8F4DEBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_85A6FEC3FC6981513410BA0AB8F42F43" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_F5EE57CFEA9286B169E4BA0AB8F4189C" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_85A6FEC3FC6981513410BA0AB8F42F43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_F35D6249C2183E0F9A51BA0AB8F49857_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_85A6FEC3FC6981513410BA0AB8F42F43" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_F35D6249C2183E0F9A51BA0AB8F49857_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_F35D6249C2183E0F9A51BA0AB8F49857" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_85A6FEC3FC6981513410BA0AB8F42F43" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_F35D6249C2183E0F9A51BA0AB8F49857" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_8E48519C38954AC1CDE7BA0AB8F49338" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_8E48519C38954AC1CDE7BA0AB8F49338" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet_9DAA8DA907889F819165BA0AB8F4B2DD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet_9DAA8DA907889F819165BA0AB8F4B2DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent_7297E81469FC9A57385ABA0AB8F445FC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent_7297E81469FC9A57385ABA0AB8F445FC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationCurrentAssetsCurrent" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationCurrentAssetsCurrent_F26E0188469FE69240E5BA0AB8F42EDB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationCurrentAssetsCurrent_F26E0188469FE69240E5BA0AB8F42EDB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent_BE0C6F4B63FF6ED7AAD8BA0AB8F54D0A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent_BE0C6F4B63FF6ED7AAD8BA0AB8F54D0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent_B1F2C6564C7CFB61FE4DBA0AB8F5516C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent_B1F2C6564C7CFB61FE4DBA0AB8F5516C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationIndefinitelivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationIndefinitelivedIntangibleAssetsExcludingGoodwill_A652956BCF927267DD89BA0AB8F5FD68" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationIndefinitelivedIntangibleAssetsExcludingGoodwill_A652956BCF927267DD89BA0AB8F5FD68" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationAmortizableIntangiblesCurrent" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationAmortizableIntangiblesCurrent_60A72EAF8FAFBF88FE8FBA0AB8F53E45" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationAmortizableIntangiblesCurrent_60A72EAF8FAFBF88FE8FBA0AB8F53E45" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets_B648D0F00BF88A3232C4BA0AB8F59501" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets_B648D0F00BF88A3232C4BA0AB8F59501" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_B2DC8DE3A7F024A41654BA0AB8F5D181" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_B2DC8DE3A7F024A41654BA0AB8F5D181" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayableAndAccruedLiabilitiesCurrent_8FD3A1B7035B1CC288A4BA0AB8F57ACF" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayableAndAccruedLiabilitiesCurrent_8FD3A1B7035B1CC288A4BA0AB8F57ACF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedIncomeTaxesPayable" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedIncomeTaxesPayable_3C8A8255A59C3E65E7D3BA0AB8F5BF56" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedIncomeTaxesPayable_3C8A8255A59C3E65E7D3BA0AB8F5BF56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredRevenueCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredRevenueCurrent_DADBAC6556C1D1DF3206BA0AB8F50F68" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredRevenueCurrent_DADBAC6556C1D1DF3206BA0AB8F50F68" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationsCurrentMaturitiesofLongTermDebt" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsCurrentMaturitiesofLongTermDebt_83A1A60C3068C6048D9BBA0AB8F58013" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsCurrentMaturitiesofLongTermDebt_83A1A60C3068C6048D9BBA0AB8F58013" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationsCurrentLiabilitiesCurrent" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsCurrentLiabilitiesCurrent_CBB65EB0B440006DBF3ABA0AB8F555AA" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsCurrentLiabilitiesCurrent_CBB65EB0B440006DBF3ABA0AB8F555AA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationsAccruedCompensationandRelatedBenefits" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsAccruedCompensationandRelatedBenefits_89F16503B0CFA2F920CCBA0AB8F52AE7" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsAccruedCompensationandRelatedBenefits_89F16503B0CFA2F920CCBA0AB8F52AE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities_4DE6471E364D80873ED0BA0AB8F5E86A" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities_4DE6471E364D80873ED0BA0AB8F5E86A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilitiesCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilitiesCurrent_D0460A50E1C092F92BDABA0AB8F5A61C" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilitiesCurrent_D0460A50E1C092F92BDABA0AB8F5A61C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationsLongtermDebt" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsLongtermDebt_6CE2E2C45187330ABB9CBA0AB8F5C7B4" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationsLongtermDebt_6CE2E2C45187330ABB9CBA0AB8F5C7B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_F7D7D77DE5DF9339426CBA0AB8F578E5" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_F7D7D77DE5DF9339426CBA0AB8F578E5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DisposalGroupIncludingDiscontinuedOperationAssetsLiabilitiesNet" xlink:label="loc_ghc_DisposalGroupIncludingDiscontinuedOperationAssetsLiabilitiesNet_9827AD77CF925CEF1714BA0AB8F5A699" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_69DE4DAC21A17540E41BBA0AB8F4CC87" xlink:to="loc_ghc_DisposalGroupIncludingDiscontinuedOperationAssetsLiabilitiesNet_9827AD77CF925CEF1714BA0AB8F5A699" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityInformationLineItems" xlink:label="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntitiesTable" xlink:label="loc_dei_EntitiesTable_C9DC3B3170F13A931D8FBA0ABA3D8619" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_EntitiesTable_C9DC3B3170F13A931D8FBA0ABA3D8619" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_1833ED939C20AFDA3BDABA0ABA3DC6FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_C9DC3B3170F13A931D8FBA0ABA3D8619" xlink:to="loc_us-gaap_StatementClassOfStockAxis_1833ED939C20AFDA3BDABA0ABA3DC6FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_3480F3CCA8C6F36A1B9ABA0ABA3EC8CD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1833ED939C20AFDA3BDABA0ABA3DC6FB" xlink:to="loc_us-gaap_ClassOfStockDomain_3480F3CCA8C6F36A1B9ABA0ABA3EC8CD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_3480F3CCA8C6F36A1B9ABA0ABA3EC8CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1833ED939C20AFDA3BDABA0ABA3DC6FB" xlink:to="loc_us-gaap_ClassOfStockDomain_3480F3CCA8C6F36A1B9ABA0ABA3EC8CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_7EEF4497923B17619ABCBA0ABA3E6925" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3480F3CCA8C6F36A1B9ABA0ABA3EC8CD" xlink:to="loc_us-gaap_CommonClassAMember_7EEF4497923B17619ABCBA0ABA3E6925" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_9BA729D8CBA49EEECF0CBA0ABA3E6043" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3480F3CCA8C6F36A1B9ABA0ABA3EC8CD" xlink:to="loc_us-gaap_CommonClassBMember_9BA729D8CBA49EEECF0CBA0ABA3E6043" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_A07FD443FAF240F94AD3BA0ABA3F97FD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_DocumentType_A07FD443FAF240F94AD3BA0ABA3F97FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_48E572F91F264B1717AEBA0ABA3F04AA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_AmendmentFlag_48E572F91F264B1717AEBA0ABA3F04AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_C8C726F938CDD6C45221BA0ABA3F42BC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_DocumentPeriodEndDate_C8C726F938CDD6C45221BA0ABA3F42BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_EA72F88345CFDAB200BCBA0ABA40B3EE" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_DocumentFiscalYearFocus_EA72F88345CFDAB200BCBA0ABA40B3EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_6ED7C333116910A3E99CBA0ABA40C044" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_DocumentFiscalPeriodFocus_6ED7C333116910A3E99CBA0ABA40C044" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_E787120473C643B2CCABBA0ABA408660" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_TradingSymbol_E787120473C643B2CCABBA0ABA408660" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_7EE53EB380D4C10455A2BA0ABA409C23" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_EntityRegistrantName_7EE53EB380D4C10455A2BA0ABA409C23" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_2A8889A1B918B28489BEBA0ABA4059A1" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_EntityCentralIndexKey_2A8889A1B918B28489BEBA0ABA4059A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_FF78F73A9D5524A72634BA0ABA41F776" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_CurrentFiscalYearEndDate_FF78F73A9D5524A72634BA0ABA41F776" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_A364D20F06DB39FD074ABA0ABA4198C2" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_EntityFilerCategory_A364D20F06DB39FD074ABA0ABA4198C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_60A333331B62FC6110E0BA0ABA411EE8" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_EntityCurrentReportingStatus_60A333331B62FC6110E0BA0ABA411EE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="loc_dei_EntityVoluntaryFilers_D61717DEEB4789C60DF5BA0ABA419425" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_EntityVoluntaryFilers_D61717DEEB4789C60DF5BA0ABA419425" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_C62AE6301C76C2DD403ABA0ABA4266E3" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_C62AE6301C76C2DD403ABA0ABA4266E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityPublicFloat" xlink:label="loc_dei_EntityPublicFloat_A1AF9CF6CBE276B4ED05BA0ABA43DDFE" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_EntityPublicFloat_A1AF9CF6CBE276B4ED05BA0ABA43DDFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_4C1119CE7FA7AB9125DDBA0ABA43BB42" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_565A14B672C2EB5CA967BA0ABA3E7400" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_4C1119CE7FA7AB9125DDBA0ABA43BB42" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/FairValueMeasurements" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/FairValueMeasurementsDetails1" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_DA7A63479AAEA9F49376BA0AB821B310" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A47344B85203157D005BBA0AB8207FAF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_DA7A63479AAEA9F49376BA0AB821B310" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A47344B85203157D005BBA0AB8207FAF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B0061C37835303238740BA0AB8200BC8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A47344B85203157D005BBA0AB8207FAF" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B0061C37835303238740BA0AB8200BC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_96A28024AE2D542123FBBA0AB82013D1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B0061C37835303238740BA0AB8200BC8" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_96A28024AE2D542123FBBA0AB82013D1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_96A28024AE2D542123FBBA0AB82013D1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B0061C37835303238740BA0AB8200BC8" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_96A28024AE2D542123FBBA0AB82013D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_A46F42C3AE042E0F1C91BA0AB820619D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_96A28024AE2D542123FBBA0AB82013D1" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_A46F42C3AE042E0F1C91BA0AB820619D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_3AA8A5CDB8940D976A37BA0AB820AE05" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_96A28024AE2D542123FBBA0AB82013D1" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_3AA8A5CDB8940D976A37BA0AB820AE05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_94B0AEC36E09CC76AF1BBA0AB820B5DB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_96A28024AE2D542123FBBA0AB82013D1" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_94B0AEC36E09CC76AF1BBA0AB820B5DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9B691D8A105971026538BA0AB8213811" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A47344B85203157D005BBA0AB8207FAF" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9B691D8A105971026538BA0AB8213811" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_C6DF059A798107EE2F3DBA0AB8210A0D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9B691D8A105971026538BA0AB8213811" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_C6DF059A798107EE2F3DBA0AB8210A0D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_C6DF059A798107EE2F3DBA0AB8210A0D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9B691D8A105971026538BA0AB8213811" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_C6DF059A798107EE2F3DBA0AB8210A0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_B6A05799A7CB6ECA1546BA0AB8215F86" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_C6DF059A798107EE2F3DBA0AB8210A0D" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_B6A05799A7CB6ECA1546BA0AB8215F86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_7F51FA3B7AC088DD54DEBA0AB8213409" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_DA7A63479AAEA9F49376BA0AB821B310" xlink:to="loc_us-gaap_AssetsAbstract_7F51FA3B7AC088DD54DEBA0AB8213409" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MoneyMarketFundsAtCarryingValue" xlink:label="loc_us-gaap_MoneyMarketFundsAtCarryingValue_2691C981EEB1B74356A7BA0AB8219881" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7F51FA3B7AC088DD54DEBA0AB8213409" xlink:to="loc_us-gaap_MoneyMarketFundsAtCarryingValue_2691C981EEB1B74356A7BA0AB8219881" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CommercialPaperTotal" xlink:label="loc_ghc_CommercialPaperTotal_FE1880FF8B18B165054DBA0AB82128AA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7F51FA3B7AC088DD54DEBA0AB8213409" xlink:to="loc_ghc_CommercialPaperTotal_FE1880FF8B18B165054DBA0AB82128AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesEquitySecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_78D2F9F9D92EA19E6F72BA0AB821D9DE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7F51FA3B7AC088DD54DEBA0AB8213409" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_78D2F9F9D92EA19E6F72BA0AB821D9DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherShortTermInvestments" xlink:label="loc_us-gaap_OtherShortTermInvestments_4CA9F57544A208E879D6BA0AB8212B3D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7F51FA3B7AC088DD54DEBA0AB8213409" xlink:to="loc_us-gaap_OtherShortTermInvestments_4CA9F57544A208E879D6BA0AB8212B3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_23EE4568209B886C0A69BA0AB8213A1F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7F51FA3B7AC088DD54DEBA0AB8213409" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_23EE4568209B886C0A69BA0AB8213A1F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:label="loc_us-gaap_LiabilitiesAbstract_061562B2EABD661E6B64BA0AB8215749" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_DA7A63479AAEA9F49376BA0AB821B310" xlink:to="loc_us-gaap_LiabilitiesAbstract_061562B2EABD661E6B64BA0AB8215749" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_39EE76BD70DB024CB65CBA0AB8212E39" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_061562B2EABD661E6B64BA0AB8215749" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_39EE76BD70DB024CB65CBA0AB8212E39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue" xlink:label="loc_us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue_C3B2F74A12C993E7BD57BA0AB821C9D4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_061562B2EABD661E6B64BA0AB8215749" xlink:to="loc_us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue_C3B2F74A12C993E7BD57BA0AB821C9D4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_MandatorilyRedeemableNoncontrollingInterestFairValueDisclosure" xlink:label="loc_ghc_MandatorilyRedeemableNoncontrollingInterestFairValueDisclosure_302832000A047FAD90C5BA0AB821D427" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_061562B2EABD661E6B64BA0AB8215749" xlink:to="loc_ghc_MandatorilyRedeemableNoncontrollingInterestFairValueDisclosure_302832000A047FAD90C5BA0AB821D427" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FinancialLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_B0C9E02BAC6AB27C4275BA0AB8213FC7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_061562B2EABD661E6B64BA0AB8215749" xlink:to="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_B0C9E02BAC6AB27C4275BA0AB8213FC7" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D0AEC0E4A7944A420ABABA0AB826F796" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_BD73B41DFBED9D908939BA0AB8258334" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D0AEC0E4A7944A420ABABA0AB826F796" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_BD73B41DFBED9D908939BA0AB8258334" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOperatingActivitiesSegmentAxis" xlink:label="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_B7066E7A3A092D494AB6BA0AB825A5FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_BD73B41DFBED9D908939BA0AB8258334" xlink:to="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_B7066E7A3A092D494AB6BA0AB825A5FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_4AAADFFC9B1AFD897574BA0AB825AC05_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_B7066E7A3A092D494AB6BA0AB825A5FB" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_4AAADFFC9B1AFD897574BA0AB825AC05_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_4AAADFFC9B1AFD897574BA0AB825AC05" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_B7066E7A3A092D494AB6BA0AB825A5FB" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_4AAADFFC9B1AFD897574BA0AB825AC05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="loc_us-gaap_SegmentDiscontinuedOperationsMember_BC7DE3B6DED2796241ADBA0AB825BD5D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentOperatingActivitiesDomain_4AAADFFC9B1AFD897574BA0AB825AC05" xlink:to="loc_us-gaap_SegmentDiscontinuedOperationsMember_BC7DE3B6DED2796241ADBA0AB825BD5D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_0ADBA0111322175511F1BA0AB82519AF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_BD73B41DFBED9D908939BA0AB8258334" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_0ADBA0111322175511F1BA0AB82519AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_273AEDBD1829E81AA991BA0AB8256A4F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_0ADBA0111322175511F1BA0AB82519AF" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_273AEDBD1829E81AA991BA0AB8256A4F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_273AEDBD1829E81AA991BA0AB8256A4F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_0ADBA0111322175511F1BA0AB82519AF" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_273AEDBD1829E81AA991BA0AB8256A4F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_VocationalSchoolCompanyMember" xlink:label="loc_ghc_VocationalSchoolCompanyMember_9E08F4ACD49BDE07A1D2BA0AB8255FF7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_273AEDBD1829E81AA991BA0AB8256A4F" xlink:to="loc_ghc_VocationalSchoolCompanyMember_9E08F4ACD49BDE07A1D2BA0AB8255FF7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_F98C2ED2DD5DFD522CEBBA0AB826F280" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D0AEC0E4A7944A420ABABA0AB826F796" xlink:to="loc_us-gaap_AssetImpairmentCharges_F98C2ED2DD5DFD522CEBBA0AB826F280" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment" xlink:label="loc_us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment_5FC92B8D1807950B158ABA0AB8269504" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D0AEC0E4A7944A420ABABA0AB826F796" xlink:to="loc_us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment_5FC92B8D1807950B158ABA0AB8269504" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ImpairmentOfIntangibleAndOtherLongLivedAssets" xlink:label="loc_ghc_ImpairmentOfIntangibleAndOtherLongLivedAssets_041AA76299AA010BC3F9BA0AB8263519" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D0AEC0E4A7944A420ABABA0AB826F796" xlink:to="loc_ghc_ImpairmentOfIntangibleAndOtherLongLivedAssets_041AA76299AA010BC3F9BA0AB8263519" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/FairValueMeasurementsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssets" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillDetails1" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_3AD932F1EC23A3CEE1AFBA0AB88E9D0E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_280BBDD98B6EB5C28697BA0AB88DF21B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_3AD932F1EC23A3CEE1AFBA0AB88E9D0E" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_280BBDD98B6EB5C28697BA0AB88DF21B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_B8F8631D0058DD6118BEBA0AB88D07AC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_280BBDD98B6EB5C28697BA0AB88DF21B" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_B8F8631D0058DD6118BEBA0AB88D07AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_038C65D7386F7BF5B82FBA0AB88D53C4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_B8F8631D0058DD6118BEBA0AB88D07AC" xlink:to="loc_us-gaap_SegmentDomain_038C65D7386F7BF5B82FBA0AB88D53C4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_038C65D7386F7BF5B82FBA0AB88D53C4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_B8F8631D0058DD6118BEBA0AB88D07AC" xlink:to="loc_us-gaap_SegmentDomain_038C65D7386F7BF5B82FBA0AB88D53C4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_7AB271A6BFDC79596846BA0AB88E4710" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_038C65D7386F7BF5B82FBA0AB88D53C4" xlink:to="loc_ghc_EducationMember_7AB271A6BFDC79596846BA0AB88E4710" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TelevisionBroadcastingMember" xlink:label="loc_ghc_TelevisionBroadcastingMember_999FDBC041AD99FFDBF9BA0AB88E9BCA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_038C65D7386F7BF5B82FBA0AB88D53C4" xlink:to="loc_ghc_TelevisionBroadcastingMember_999FDBC041AD99FFDBF9BA0AB88E9BCA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherBusinessesMember" xlink:label="loc_ghc_OtherBusinessesMember_CC72962723344A3EC79CBA0AB88EC4F1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_038C65D7386F7BF5B82FBA0AB88D53C4" xlink:to="loc_ghc_OtherBusinessesMember_CC72962723344A3EC79CBA0AB88EC4F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_8F95067F437E93618614BA0AB88ECD78" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_280BBDD98B6EB5C28697BA0AB88DF21B" xlink:to="loc_us-gaap_SubsegmentsAxis_8F95067F437E93618614BA0AB88ECD78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_5B64AF4B170461D607D4BA0AB88E1312_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_8F95067F437E93618614BA0AB88ECD78" xlink:to="loc_us-gaap_SubsegmentsDomain_5B64AF4B170461D607D4BA0AB88E1312_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_5B64AF4B170461D607D4BA0AB88E1312" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_8F95067F437E93618614BA0AB88ECD78" xlink:to="loc_us-gaap_SubsegmentsDomain_5B64AF4B170461D607D4BA0AB88E1312" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_F8692DBBC7592778F250BA0AB88E3999" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_5B64AF4B170461D607D4BA0AB88E1312" xlink:to="loc_ghc_HigherEducationMember_F8692DBBC7592778F250BA0AB88E3999" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TestPreparationMember" xlink:label="loc_ghc_TestPreparationMember_B3D2F5D28DCF18959007BA0AB88EB8B3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_5B64AF4B170461D607D4BA0AB88E1312" xlink:to="loc_ghc_TestPreparationMember_B3D2F5D28DCF18959007BA0AB88EB8B3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanInternationalMember" xlink:label="loc_ghc_KaplanInternationalMember_43FD94B5A00011454859BA0AB88EA493" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_5B64AF4B170461D607D4BA0AB88E1312" xlink:to="loc_ghc_KaplanInternationalMember_43FD94B5A00011454859BA0AB88EA493" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_3AD932F1EC23A3CEE1AFBA0AB88E9D0E" xlink:to="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillGross" xlink:label="loc_us-gaap_GoodwillGross_B85E0597F89097B6F57ABA0AB88FCEC7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:to="loc_us-gaap_GoodwillGross_B85E0597F89097B6F57ABA0AB88FCEC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_2E8FEB133D68F7CD9AE9BA0AB88F008D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_2E8FEB133D68F7CD9AE9BA0AB88F008D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_9313D459196CF936F30ABA0AB88FC4D7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:to="loc_us-gaap_Goodwill_9313D459196CF936F30ABA0AB88FC4D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_D2972D54E6A4BE51824BBA0AB88F873A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_D2972D54E6A4BE51824BBA0AB88F873A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_9CCF30B2374F64AF47D3BA0AB88FD35E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_9CCF30B2374F64AF47D3BA0AB88FD35E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_A7D55B1BC0E7C681F0C7BA0AB88F313E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_A7D55B1BC0E7C681F0C7BA0AB88F313E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit" xlink:label="loc_us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit_676B20FD3215F8E8205DBA0AB88F16E0" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:to="loc_us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit_676B20FD3215F8E8205DBA0AB88F16E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_0ACB21D05A0C3B6B68F0BA0AB88FE8F2" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_EF0D7DD92CE594FC478EBA0AB88EE0FD" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_0ACB21D05A0C3B6B68F0BA0AB88FE8F2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsFiniteLivedIntangibleAssetsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_000C3942FA2A67F6BADBBA0AB8968870" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2BED70DB750DB3F8B663BA0AB8969AF4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_000C3942FA2A67F6BADBBA0AB8968870" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2BED70DB750DB3F8B663BA0AB8969AF4" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_62B39512FE6AD29680E3BA0AB89655E4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2BED70DB750DB3F8B663BA0AB8969AF4" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_62B39512FE6AD29680E3BA0AB89655E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_6410FF28C9E5AB907A61BA0AB89671B6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_62B39512FE6AD29680E3BA0AB89655E4" xlink:to="loc_us-gaap_SegmentDomain_6410FF28C9E5AB907A61BA0AB89671B6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_6410FF28C9E5AB907A61BA0AB89671B6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_62B39512FE6AD29680E3BA0AB89655E4" xlink:to="loc_us-gaap_SegmentDomain_6410FF28C9E5AB907A61BA0AB89671B6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_F3263393604E70C09E53BA0AB896A46D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_6410FF28C9E5AB907A61BA0AB89671B6" xlink:to="loc_ghc_EducationMember_F3263393604E70C09E53BA0AB896A46D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TestPreparationMember" xlink:label="loc_ghc_TestPreparationMember_483DE29E912479C511FCBA0AB896CF76" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_EducationMember_F3263393604E70C09E53BA0AB896A46D" xlink:to="loc_ghc_TestPreparationMember_483DE29E912479C511FCBA0AB896CF76" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanInternationalMember" xlink:label="loc_ghc_KaplanInternationalMember_7E32589DD0B6DDB6C325BA0AB896A562" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_EducationMember_F3263393604E70C09E53BA0AB896A46D" xlink:to="loc_ghc_KaplanInternationalMember_7E32589DD0B6DDB6C325BA0AB896A562" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_340D17315E1EC4A7322BBA0AB8960592" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_000C3942FA2A67F6BADBBA0AB8968870" xlink:to="loc_us-gaap_AssetImpairmentCharges_340D17315E1EC4A7322BBA0AB8960592" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_9E2AAF1FBEE230A85F38BA0AB8966F66" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_000C3942FA2A67F6BADBBA0AB8968870" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_9E2AAF1FBEE230A85F38BA0AB8966F66" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberofBusinessesRecordedImpairmentofIntangibleAndOtherLongLivedAssets" xlink:label="loc_ghc_NumberofBusinessesRecordedImpairmentofIntangibleAndOtherLongLivedAssets_DC50E95B5A85560A7EA9BA0AB896DABE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_000C3942FA2A67F6BADBBA0AB8968870" xlink:to="loc_ghc_NumberofBusinessesRecordedImpairmentofIntangibleAndOtherLongLivedAssets_DC50E95B5A85560A7EA9BA0AB896DABE" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ImpairmentOfIntangibleAndOtherLongLivedAssets" xlink:label="loc_ghc_ImpairmentOfIntangibleAndOtherLongLivedAssets_BDCC2B5700E8C1F76942BA0AB896936E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_000C3942FA2A67F6BADBBA0AB8968870" xlink:to="loc_ghc_ImpairmentOfIntangibleAndOtherLongLivedAssets_BDCC2B5700E8C1F76942BA0AB896936E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsGoodwillAndOtherIntangibleAssetsGoodwillNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_594388A1161FE100273BBA0AB89FD1DC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_ABFA3BCEA83AD0459076BA0AB89EAA49" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_594388A1161FE100273BBA0AB89FD1DC" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_ABFA3BCEA83AD0459076BA0AB89EAA49" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_2A7B7CD2E31385A1D1A5BA0AB89FBA32" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_ABFA3BCEA83AD0459076BA0AB89EAA49" xlink:to="loc_us-gaap_SubsegmentsAxis_2A7B7CD2E31385A1D1A5BA0AB89FBA32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_8D33C48A96BD675135A2BA0AB89FC21F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_2A7B7CD2E31385A1D1A5BA0AB89FBA32" xlink:to="loc_us-gaap_SubsegmentsDomain_8D33C48A96BD675135A2BA0AB89FC21F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_8D33C48A96BD675135A2BA0AB89FC21F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_2A7B7CD2E31385A1D1A5BA0AB89FBA32" xlink:to="loc_us-gaap_SubsegmentsDomain_8D33C48A96BD675135A2BA0AB89FC21F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_9F089921D58FAF97A8D1BA0AB89FA940" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_8D33C48A96BD675135A2BA0AB89FC21F" xlink:to="loc_ghc_HigherEducationMember_9F089921D58FAF97A8D1BA0AB89FA940" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_53F5FA3AF99C6760031BBA0AB89FECAB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_ABFA3BCEA83AD0459076BA0AB89EAA49" xlink:to="loc_dei_LegalEntityAxis_53F5FA3AF99C6760031BBA0AB89FECAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_DF1DAEB9AF4FF7566AB5BA0AB89F1DBC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_53F5FA3AF99C6760031BBA0AB89FECAB" xlink:to="loc_dei_EntityDomain_DF1DAEB9AF4FF7566AB5BA0AB89F1DBC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_DF1DAEB9AF4FF7566AB5BA0AB89F1DBC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_53F5FA3AF99C6760031BBA0AB89FECAB" xlink:to="loc_dei_EntityDomain_DF1DAEB9AF4FF7566AB5BA0AB89F1DBC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForneyMember" xlink:label="loc_ghc_ForneyMember_7864FDF9B7A85FF51E4CBA0AB89F959E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_DF1DAEB9AF4FF7566AB5BA0AB89F1DBC" xlink:to="loc_ghc_ForneyMember_7864FDF9B7A85FF51E4CBA0AB89F959E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_FDB07AD56A106F766D4FBA0AB89F6B55" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_ABFA3BCEA83AD0459076BA0AB89EAA49" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_FDB07AD56A106F766D4FBA0AB89F6B55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_98A1E22568D1D6145A30BA0AB89F4C54_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FDB07AD56A106F766D4FBA0AB89F6B55" xlink:to="loc_us-gaap_SegmentDomain_98A1E22568D1D6145A30BA0AB89F4C54_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_98A1E22568D1D6145A30BA0AB89F4C54" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FDB07AD56A106F766D4FBA0AB89F6B55" xlink:to="loc_us-gaap_SegmentDomain_98A1E22568D1D6145A30BA0AB89F4C54" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForneyMember" xlink:label="loc_ghc_ForneyMember_87C2176D49E7F87EA16ABA0AB89FED15" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_98A1E22568D1D6145A30BA0AB89F4C54" xlink:to="loc_ghc_ForneyMember_87C2176D49E7F87EA16ABA0AB89FED15" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherBusinessesMember" xlink:label="loc_ghc_OtherBusinessesMember_4CD79C4496243CAB6011BA0AB89FB54A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_98A1E22568D1D6145A30BA0AB89F4C54" xlink:to="loc_ghc_OtherBusinessesMember_4CD79C4496243CAB6011BA0AB89FB54A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_A66BF043CFC1C27666A7BA0AB89FDC0A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_98A1E22568D1D6145A30BA0AB89F4C54" xlink:to="loc_ghc_EducationMember_A66BF043CFC1C27666A7BA0AB89FDC0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_03789D4D704629B745BCBA0AB89FF246" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_594388A1161FE100273BBA0AB89FD1DC" xlink:to="loc_us-gaap_AssetImpairmentCharges_03789D4D704629B745BCBA0AB89FF246" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfBusinessesRecordedImpairmentOfGoodwill" xlink:label="loc_ghc_NumberOfBusinessesRecordedImpairmentOfGoodwill_648ABED55AEF988DEA23BA0AB89FCE7D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_594388A1161FE100273BBA0AB89FD1DC" xlink:to="loc_ghc_NumberOfBusinessesRecordedImpairmentOfGoodwill_648ABED55AEF988DEA23BA0AB89FCE7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_6EB6578A402BC29731C6BA0AB89FB63C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_594388A1161FE100273BBA0AB89FD1DC" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_6EB6578A402BC29731C6BA0AB89FB63C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_0E668BBC2D1AC3300287BA0AB89FBD56" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_594388A1161FE100273BBA0AB89FD1DC" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_0E668BBC2D1AC3300287BA0AB89FBD56" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsGoodwillAndOtherIntangibleAssetsIndefiniteLivedIntangibleAssetsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_7F23B3510477E82A5D2EBA0AB89B0B47" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_0E9467E47C4C99C02E29BA0AB89A5B20" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_7F23B3510477E82A5D2EBA0AB89B0B47" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_0E9467E47C4C99C02E29BA0AB89A5B20" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_141D0D58D24299B85A55BA0AB89A8E4F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_0E9467E47C4C99C02E29BA0AB89A5B20" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_141D0D58D24299B85A55BA0AB89A8E4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_F678A6BD7B48B9E8FDB2BA0AB89ADED6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_141D0D58D24299B85A55BA0AB89A8E4F" xlink:to="loc_us-gaap_SegmentDomain_F678A6BD7B48B9E8FDB2BA0AB89ADED6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_F678A6BD7B48B9E8FDB2BA0AB89ADED6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_141D0D58D24299B85A55BA0AB89A8E4F" xlink:to="loc_us-gaap_SegmentDomain_F678A6BD7B48B9E8FDB2BA0AB89ADED6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_CE4A1321811AC48E8B54BA0AB89AEC03" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_F678A6BD7B48B9E8FDB2BA0AB89ADED6" xlink:to="loc_ghc_EducationMember_CE4A1321811AC48E8B54BA0AB89AEC03" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_0AEC893663C9962F1225BA0AB89AE0B0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_EducationMember_CE4A1321811AC48E8B54BA0AB89AEC03" xlink:to="loc_ghc_HigherEducationMember_0AEC893663C9962F1225BA0AB89AE0B0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherBusinessesMember" xlink:label="loc_ghc_OtherBusinessesMember_2347A3D40E1888B2E03DBA0AB89B5129" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_F678A6BD7B48B9E8FDB2BA0AB89ADED6" xlink:to="loc_ghc_OtherBusinessesMember_2347A3D40E1888B2E03DBA0AB89B5129" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_FE7243400D9EC0F4EEE8BA0AB89B5383" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_7F23B3510477E82A5D2EBA0AB89B0B47" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_FE7243400D9EC0F4EEE8BA0AB89B5383" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberofBusinessesRecordedImpairmentofIntangibleAndOtherLongLivedAssets" xlink:label="loc_ghc_NumberofBusinessesRecordedImpairmentofIntangibleAndOtherLongLivedAssets_CFB18AAACC879F0A6CB6BA0AB89BB2A0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_7F23B3510477E82A5D2EBA0AB89B0B47" xlink:to="loc_ghc_NumberofBusinessesRecordedImpairmentofIntangibleAndOtherLongLivedAssets_CFB18AAACC879F0A6CB6BA0AB89BB2A0" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsOtherIntangibleAssetsDetails2" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_A3CDE0921D9239C02FCFBA0AB886C0AA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_35840ABECFA4BB2107FDBA0AB885C90E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_A3CDE0921D9239C02FCFBA0AB886C0AA" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_35840ABECFA4BB2107FDBA0AB885C90E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_F778F101DD14F9F29CCFBA0AB886EEEC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_35840ABECFA4BB2107FDBA0AB885C90E" xlink:to="loc_us-gaap_RangeAxis_F778F101DD14F9F29CCFBA0AB886EEEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_83EF1490BF3A3D9909B1BA0AB886AE24_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_F778F101DD14F9F29CCFBA0AB886EEEC" xlink:to="loc_us-gaap_RangeMember_83EF1490BF3A3D9909B1BA0AB886AE24_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_83EF1490BF3A3D9909B1BA0AB886AE24" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_F778F101DD14F9F29CCFBA0AB886EEEC" xlink:to="loc_us-gaap_RangeMember_83EF1490BF3A3D9909B1BA0AB886AE24" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_3D3707B02234BE6C65C1BA0AB88603CA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_83EF1490BF3A3D9909B1BA0AB886AE24" xlink:to="loc_us-gaap_MinimumMember_3D3707B02234BE6C65C1BA0AB88603CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_58B71A03F26F7AD27A4BBA0AB8860982" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_83EF1490BF3A3D9909B1BA0AB886AE24" xlink:to="loc_us-gaap_MaximumMember_58B71A03F26F7AD27A4BBA0AB8860982" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B3EBB420195D8AF05B50BA0AB886AF2B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_35840ABECFA4BB2107FDBA0AB885C90E" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B3EBB420195D8AF05B50BA0AB886AF2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B3EBB420195D8AF05B50BA0AB886AF2B" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B3EBB420195D8AF05B50BA0AB886AF2B" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_0212FCA4BF95540E63BDBA0AB8868CC0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062" xlink:to="loc_us-gaap_CustomerRelationshipsMember_0212FCA4BF95540E63BDBA0AB8868CC0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TrademarksAndTradeNamesMember" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_8E5FF77C8B80A8219DB3BA0AB886DEA1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_8E5FF77C8B80A8219DB3BA0AB886DEA1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ContractBasedIntangibleAssetsMember" xlink:label="loc_us-gaap_ContractBasedIntangibleAssetsMember_1682599936D9AF1AB99CBA0AB886B6A0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062" xlink:to="loc_us-gaap_ContractBasedIntangibleAssetsMember_1682599936D9AF1AB99CBA0AB886B6A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DatabasesMember" xlink:label="loc_us-gaap_DatabasesMember_3E61312C324B3876488CBA0AB886DD8E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062" xlink:to="loc_us-gaap_DatabasesMember_3E61312C324B3876488CBA0AB886DD8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoncompeteAgreementsMember" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_663FAA6109964D263E14BA0AB88656D3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_663FAA6109964D263E14BA0AB88656D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_5B31DB005E3639EB6B47BA0AB8867343" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_CCA75C0E60A1E9F0D305BA0AB886C062" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_5B31DB005E3639EB6B47BA0AB8867343" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_D0E2D3D42E7C1F29695ABA0AB886ABD4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_A3CDE0921D9239C02FCFBA0AB886C0AA" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_D0E2D3D42E7C1F29695ABA0AB886ABD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_4AF761DFAF9A0EB66A9ABA0AB8868998" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_A3CDE0921D9239C02FCFBA0AB886C0AA" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_4AF761DFAF9A0EB66A9ABA0AB8868998" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_60907E3CB95F83FC488EBA0AB887BE21" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_A3CDE0921D9239C02FCFBA0AB886C0AA" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_60907E3CB95F83FC488EBA0AB887BE21" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_D02D96D960A422726B11BA0AB88742A9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_A3CDE0921D9239C02FCFBA0AB886C0AA" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_D02D96D960A422726B11BA0AB88742A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_8D66F3B33ECCD75C4BA8BA0AB887FBF2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_56B309C78B375465A28BBA0AB8876ECC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_8D66F3B33ECCD75C4BA8BA0AB887FBF2" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_56B309C78B375465A28BBA0AB8876ECC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_FC6B591388D146BB25E6BA0AB8879EF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_56B309C78B375465A28BBA0AB8876ECC" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_FC6B591388D146BB25E6BA0AB8879EF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_DA57932CAFB2919B4AF0BA0AB88745FC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_FC6B591388D146BB25E6BA0AB8879EF5" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_DA57932CAFB2919B4AF0BA0AB88745FC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_DA57932CAFB2919B4AF0BA0AB88745FC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_FC6B591388D146BB25E6BA0AB8879EF5" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_DA57932CAFB2919B4AF0BA0AB88745FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TrademarksAndTradeNamesMember" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_621405FFA6E1BC24E04CBA0AB8873AF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_DA57932CAFB2919B4AF0BA0AB88745FC" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_621405FFA6E1BC24E04CBA0AB8873AF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingAndBroadcastRightsMember" xlink:label="loc_us-gaap_OperatingAndBroadcastRightsMember_6A6FAD1425A1E54EC96BBA0AB887C8D6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_DA57932CAFB2919B4AF0BA0AB88745FC" xlink:to="loc_us-gaap_OperatingAndBroadcastRightsMember_6A6FAD1425A1E54EC96BBA0AB887C8D6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LicensureAndAccreditationMember" xlink:label="loc_ghc_LicensureAndAccreditationMember_979894A4483F5675C5B4BA0AB8878FBB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_DA57932CAFB2919B4AF0BA0AB88745FC" xlink:to="loc_ghc_LicensureAndAccreditationMember_979894A4483F5675C5B4BA0AB8878FBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_9E52C298C00802202334BA0AB8872DC9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_DA57932CAFB2919B4AF0BA0AB88745FC" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_9E52C298C00802202334BA0AB8872DC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_154C8F755D5E8F51BCE3BA0AB887DB05" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_8D66F3B33ECCD75C4BA8BA0AB887FBF2" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_154C8F755D5E8F51BCE3BA0AB887DB05" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/GoodwillAndOtherIntangibleAssetsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_4751573D840B4CE1F01ABA0AB8A25D31" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_86D9EAFEF004B0B2B892BA0AB8A273DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_4751573D840B4CE1F01ABA0AB8A25D31" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_86D9EAFEF004B0B2B892BA0AB8A273DC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_2C975B5FD42F68C0E844BA0AB8A2E85C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_86D9EAFEF004B0B2B892BA0AB8A273DC" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_2C975B5FD42F68C0E844BA0AB8A2E85C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_1CC7213551130F2F3A44BA0AB8A26FEC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_2C975B5FD42F68C0E844BA0AB8A2E85C" xlink:to="loc_us-gaap_SegmentDomain_1CC7213551130F2F3A44BA0AB8A26FEC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_1CC7213551130F2F3A44BA0AB8A26FEC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_2C975B5FD42F68C0E844BA0AB8A2E85C" xlink:to="loc_us-gaap_SegmentDomain_1CC7213551130F2F3A44BA0AB8A26FEC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_F9FA18561DFEA1D60A29BA0AB8A2BA09" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_1CC7213551130F2F3A44BA0AB8A26FEC" xlink:to="loc_ghc_EducationMember_F9FA18561DFEA1D60A29BA0AB8A2BA09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfGoodwillTextBlock" xlink:label="loc_us-gaap_ScheduleOfGoodwillTextBlock_E1DB934102B2215614FBBA0AB8A34C99" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4751573D840B4CE1F01ABA0AB8A25D31" xlink:to="loc_us-gaap_ScheduleOfGoodwillTextBlock_E1DB934102B2215614FBBA0AB8A34C99" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ScheduleofFiniteandIndefiniteLivedIntangibleAssetsTableTextBlock" xlink:label="loc_ghc_ScheduleofFiniteandIndefiniteLivedIntangibleAssetsTableTextBlock_1316A9B756D454E79995BA0AB8A361A4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4751573D840B4CE1F01ABA0AB8A25D31" xlink:to="loc_ghc_ScheduleofFiniteandIndefiniteLivedIntangibleAssetsTableTextBlock_1316A9B756D454E79995BA0AB8A361A4" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxes" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxesDeferredIncomeTaxesComponentsDetails4" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DeferredIncomeTaxLiabilitiesLineItems" xlink:label="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DeferredIncomeTaxLiabilitiesTable" xlink:label="loc_ghc_DeferredIncomeTaxLiabilitiesTable_46972D5C7C967A734098BE163712E627" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_ghc_DeferredIncomeTaxLiabilitiesTable_46972D5C7C967A734098BE163712E627" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_F6CFA0341349A0C27BB8BE1637128DCF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesTable_46972D5C7C967A734098BE163712E627" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_F6CFA0341349A0C27BB8BE1637128DCF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_605406E095322888E1F4BE163712735D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F6CFA0341349A0C27BB8BE1637128DCF" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_605406E095322888E1F4BE163712735D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_605406E095322888E1F4BE163712735D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F6CFA0341349A0C27BB8BE1637128DCF" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_605406E095322888E1F4BE163712735D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_A22060A89BE43C40D44FBE163712E21A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_605406E095322888E1F4BE163712735D" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_A22060A89BE43C40D44FBE163712E21A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_86F315E5A7A28EB32BF4BE16371200E7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesTable_46972D5C7C967A734098BE163712E627" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_86F315E5A7A28EB32BF4BE16371200E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_BE744F931DDF3B00DDD0BE1637124DBC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_86F315E5A7A28EB32BF4BE16371200E7" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_BE744F931DDF3B00DDD0BE1637124DBC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_BE744F931DDF3B00DDD0BE1637124DBC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_86F315E5A7A28EB32BF4BE16371200E7" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_BE744F931DDF3B00DDD0BE1637124DBC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_2CDAB6655C06322313CDBE1637128DA2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_BE744F931DDF3B00DDD0BE1637124DBC" xlink:to="loc_us-gaap_ForeignCountryMember_2CDAB6655C06322313CDBE1637128DA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_1A1A6553AC25D8F50AFEBE26AF551B35" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_BE744F931DDF3B00DDD0BE1637124DBC" xlink:to="loc_us-gaap_DomesticCountryMember_1A1A6553AC25D8F50AFEBE26AF551B35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_97024713886E1258E365BE16371272AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_97024713886E1258E365BE16371272AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther_56CE61152E4D0634A6ADBE163712D73B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther_56CE61152E4D0634A6ADBE163712D73B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_95A40F87C0DD0C460448BE163712E513" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_95A40F87C0DD0C460448BE163712E513" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_DD7E941CF63075F7EE84BE1637129399" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_DD7E941CF63075F7EE84BE1637129399" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_FF22C34679FE57DF07D2BE1637125DD5" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_FF22C34679FE57DF07D2BE1637125DD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_04EA712D721F5D709BCFBE1637131530" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_04EA712D721F5D709BCFBE1637131530" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_A5B39D37D2641602FEE2BE1637136910" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_A5B39D37D2641602FEE2BE1637136910" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsCapitalLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsCapitalLossCarryforwards_FBBA4BDA0EDE8E8F2F02BE1637132A82" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsCapitalLossCarryforwards_FBBA4BDA0EDE8E8F2F02BE1637132A82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther_3C753FE9FB201D21D3A0BE1637131316" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther_3C753FE9FB201D21D3A0BE1637131316" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_B06D4EC69DF13503FD4ABE163713FACF" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_B06D4EC69DF13503FD4ABE163713FACF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_FD654F031B770B70818EBE163713812D" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_FD654F031B770B70818EBE163713812D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_2636DB5DE5736594E277BE163713279F" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_2636DB5DE5736594E277BE163713279F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_A73C0D4D2C2CED136327BE163714C459" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_A73C0D4D2C2CED136327BE163714C459" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPrepaidExpenses" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPrepaidExpenses_3633B28D1E98871AF506BE163714C7FC" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPrepaidExpenses_3633B28D1E98871AF506BE163714C7FC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DeferredTaxLiabilitiesUnrealizedGainsonAvailableforsaleSecurities" xlink:label="loc_ghc_DeferredTaxLiabilitiesUnrealizedGainsonAvailableforsaleSecurities_D22F314DC20D932B9EACBE163714C334" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_ghc_DeferredTaxLiabilitiesUnrealizedGainsonAvailableforsaleSecurities_D22F314DC20D932B9EACBE163714C334" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets_378314AFB846A1273EC4BE163714B70F" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets_378314AFB846A1273EC4BE163714B70F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_8322E761DE2E9A2B5D97BE1637143389" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_8322E761DE2E9A2B5D97BE1637143389" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_22D53A2EE14374A7E9A0BE163714E9EC" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_22D53A2EE14374A7E9A0BE163714E9EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_BF1A20C0C9782F23D1ECBE1637141EBB" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DeferredIncomeTaxLiabilitiesLineItems_D53B9FC11F0942FC6398BE1637129458" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_BF1A20C0C9782F23D1ECBE1637141EBB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxesDeferredTaxValluationAllowancesDetails6" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowanceLineItems" xlink:label="loc_us-gaap_ValuationAllowanceLineItems_D5F03FDFAA8CA02C6066BA0AB84B90D6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_7CC7B88F178B1AD6008EBA0AB84B6FFA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_D5F03FDFAA8CA02C6066BA0AB84B90D6" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_7CC7B88F178B1AD6008EBA0AB84B6FFA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_B6A0838B9A8CB42CFE5DBA0AB84B9227" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_7CC7B88F178B1AD6008EBA0AB84B6FFA" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_B6A0838B9A8CB42CFE5DBA0AB84B9227" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_1AB52B103DE553B4C35DBA0AB84B6D64_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_B6A0838B9A8CB42CFE5DBA0AB84B9227" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_1AB52B103DE553B4C35DBA0AB84B6D64_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_1AB52B103DE553B4C35DBA0AB84B6D64" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_B6A0838B9A8CB42CFE5DBA0AB84B9227" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_1AB52B103DE553B4C35DBA0AB84B6D64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember" xlink:label="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_13290124FE42720B7418BA0AB84B8015" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_1AB52B103DE553B4C35DBA0AB84B6D64" xlink:to="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_13290124FE42720B7418BA0AB84B8015" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_F54F7114374C011ED518BA0AB84B7113" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_D5F03FDFAA8CA02C6066BA0AB84B90D6" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_F54F7114374C011ED518BA0AB84B7113" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_CBF3DBEF71DF0602E74BBA0AB84B0582" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_F54F7114374C011ED518BA0AB84B7113" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_CBF3DBEF71DF0602E74BBA0AB84B0582" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ValuationAllowancesAndReservesChargedToCostAndExpenseAndOtherCharges" xlink:label="loc_ghc_ValuationAllowancesAndReservesChargedToCostAndExpenseAndOtherCharges_E5A9EED1929CA9E21DDBBA0AB84B6450" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_F54F7114374C011ED518BA0AB84B7113" xlink:to="loc_ghc_ValuationAllowancesAndReservesChargedToCostAndExpenseAndOtherCharges_E5A9EED1929CA9E21DDBBA0AB84B6450" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_155AAB1F48C7E7DF483EBA0AB84BA143" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_F54F7114374C011ED518BA0AB84B7113" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_155AAB1F48C7E7DF483EBA0AB84BA143" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxesIncomeFromOperationsDetails1" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxesIncomeTaxReconciliationDetails3" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomeTaxesLineItems" xlink:label="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomeTaxesTable" xlink:label="loc_ghc_IncomeTaxesTable_A60DB5E9824F4D11254ABC032923B663" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_ghc_IncomeTaxesTable_A60DB5E9824F4D11254ABC032923B663" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_575C51362EE0ABBF7BB4BC032923C203" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_A60DB5E9824F4D11254ABC032923B663" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_575C51362EE0ABBF7BB4BC032923C203" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_58C38D6FC24632891660BC032923B97D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_575C51362EE0ABBF7BB4BC032923C203" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_58C38D6FC24632891660BC032923B97D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_58C38D6FC24632891660BC032923B97D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_575C51362EE0ABBF7BB4BC032923C203" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_58C38D6FC24632891660BC032923B97D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_7D09D194CC41D6B6C713BC0329237685" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_58C38D6FC24632891660BC032923B97D" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_7D09D194CC41D6B6C713BC0329237685" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_B820F7E19364F660EC33BC032923E4DB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_58C38D6FC24632891660BC032923B97D" xlink:to="loc_us-gaap_DomesticCountryMember_B820F7E19364F660EC33BC032923E4DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_BCEC46E18429A3E38038BC032923EFFF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_58C38D6FC24632891660BC032923B97D" xlink:to="loc_us-gaap_ForeignCountryMember_BCEC46E18429A3E38038BC032923EFFF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_D646A2CBB368BE28C9F6BC032923FD07" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_D646A2CBB368BE28C9F6BC032923FD07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_69968193A233D48468BFBC0329238B9A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_69968193A233D48468BFBC0329238B9A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_392558B7ED65B7F04766BC032923B16D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_392558B7ED65B7F04766BC032923B16D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings" xlink:label="loc_us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_0D8C9646BDBE6EB56A77BC032923E4D7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_0D8C9646BDBE6EB56A77BC032923E4D7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount" xlink:label="loc_ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount_F8997913A9BC1A3C66F7BC032923D2FF" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount_F8997913A9BC1A3C66F7BC032923D2FF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EffectiveIncomeTaxRateReconciliationImpairmentLossesandDispositionofBusiness" xlink:label="loc_ghc_EffectiveIncomeTaxRateReconciliationImpairmentLossesandDispositionofBusiness_7C359EFE117364408976BC032923B386" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_ghc_EffectiveIncomeTaxRateReconciliationImpairmentLossesandDispositionofBusiness_7C359EFE117364408976BC032923B386" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities" xlink:label="loc_us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities_335B4CE42720642FD757BC03292367B1" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities_335B4CE42720642FD757BC03292367B1" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomeTaxReconciliationDeferredTaxAssetsWriteoff" xlink:label="loc_ghc_IncomeTaxReconciliationDeferredTaxAssetsWriteoff_557620D49508E2B0B893BC03292338C7" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_ghc_IncomeTaxReconciliationDeferredTaxAssetsWriteoff_557620D49508E2B0B893BC03292338C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_7BFC0BEB6AF959A474FCBC032923769C" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_7BFC0BEB6AF959A474FCBC032923769C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_2C2E3B5536A392C2E12ABC032923B160" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_2C2E3B5536A392C2E12ABC032923B160" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_D2099DF91887AC2A618BBC0329239535" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_D2099DF91887AC2A618BBC0329239535" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_6AF57383B5653AAFF227BC03292356D8" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_CDD29A21C9E1D4B05F3ABC032923D71F" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_6AF57383B5653AAFF227BC03292356D8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxesIncomeTaxesUnrecognizedTaxBenefitsRollforwardDetails7" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomeTaxesLineItems" xlink:label="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomeTaxesTable" xlink:label="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxCreditCarryforwardAxis" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis_68D9CE9F00C269BC262FBE70DC6DD3CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:to="loc_us-gaap_TaxCreditCarryforwardAxis_68D9CE9F00C269BC262FBE70DC6DD3CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_0F2587BCEF9F50CE8578BE70DC6D1A24_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_68D9CE9F00C269BC262FBE70DC6DD3CC" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_0F2587BCEF9F50CE8578BE70DC6D1A24_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_0F2587BCEF9F50CE8578BE70DC6D1A24" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_68D9CE9F00C269BC262FBE70DC6DD3CC" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_0F2587BCEF9F50CE8578BE70DC6D1A24" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CapitalLossCarryforwardsTo2013TaxYearMember" xlink:label="loc_ghc_CapitalLossCarryforwardsTo2013TaxYearMember_CDC8486BBC12A637204EBE70DC6D724D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_0F2587BCEF9F50CE8578BE70DC6D1A24" xlink:to="loc_ghc_CapitalLossCarryforwardsTo2013TaxYearMember_CDC8486BBC12A637204EBE70DC6D724D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLossCarryforwardMember" xlink:label="loc_us-gaap_CapitalLossCarryforwardMember_F1FF12A3A2087E3F0212BE70DC6D1458" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_0F2587BCEF9F50CE8578BE70DC6D1A24" xlink:to="loc_us-gaap_CapitalLossCarryforwardMember_F1FF12A3A2087E3F0212BE70DC6D1458" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_2F4862A80D330923D667BE70DC6D9ED1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_2F4862A80D330923D667BE70DC6D9ED1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_71107E09ED4FB7EC3BF7BE70DC6D5899_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_2F4862A80D330923D667BE70DC6D9ED1" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_71107E09ED4FB7EC3BF7BE70DC6D5899_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_71107E09ED4FB7EC3BF7BE70DC6D5899" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_2F4862A80D330923D667BE70DC6D9ED1" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_71107E09ED4FB7EC3BF7BE70DC6D5899" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_3E74641958477820D5BFBE70DC6E7FC9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_71107E09ED4FB7EC3BF7BE70DC6D5899" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_3E74641958477820D5BFBE70DC6E7FC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_C5D98A98E9A6D6745278BE70DC6EBC58" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_71107E09ED4FB7EC3BF7BE70DC6D5899" xlink:to="loc_us-gaap_DomesticCountryMember_C5D98A98E9A6D6745278BE70DC6EBC58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_5EC77BA6EC111200FECFBE70DC6E974B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_71107E09ED4FB7EC3BF7BE70DC6D5899" xlink:to="loc_us-gaap_ForeignCountryMember_5EC77BA6EC111200FECFBE70DC6E974B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DomesticAndStateMember" xlink:label="loc_ghc_DomesticAndStateMember_5754D2FECEFED508E19EBE70DC6E3E42" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_71107E09ED4FB7EC3BF7BE70DC6D5899" xlink:to="loc_ghc_DomesticAndStateMember_5754D2FECEFED508E19EBE70DC6E3E42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AustralianTaxationOfficeMember" xlink:label="loc_us-gaap_AustralianTaxationOfficeMember_9250FD43D94678A21600BE70DC6E3B84" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_71107E09ED4FB7EC3BF7BE70DC6D5899" xlink:to="loc_us-gaap_AustralianTaxationOfficeMember_9250FD43D94678A21600BE70DC6E3B84" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CarryforwardsPeriodAxis" xlink:label="loc_ghc_CarryforwardsPeriodAxis_6E5C81FE7ACBE3059871BE70DC6E676D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:to="loc_ghc_CarryforwardsPeriodAxis_6E5C81FE7ACBE3059871BE70DC6E676D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CarryforwardPeriodDomain" xlink:label="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_CarryforwardsPeriodAxis_6E5C81FE7ACBE3059871BE70DC6E676D" xlink:to="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CarryforwardPeriodDomain" xlink:label="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_CarryforwardsPeriodAxis_6E5C81FE7ACBE3059871BE70DC6E676D" xlink:to="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LossCarryforwardsExpirationsRangeOneMember" xlink:label="loc_ghc_LossCarryforwardsExpirationsRangeOneMember_14969687DC823F0B8EC1BE70DC6FD58A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA" xlink:to="loc_ghc_LossCarryforwardsExpirationsRangeOneMember_14969687DC823F0B8EC1BE70DC6FD58A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LossCarryforwardsExpirationsRangeTwoMember" xlink:label="loc_ghc_LossCarryforwardsExpirationsRangeTwoMember_69EFB06492DA32A97BA0BE70DC6F5197" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA" xlink:to="loc_ghc_LossCarryforwardsExpirationsRangeTwoMember_69EFB06492DA32A97BA0BE70DC6F5197" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForeignTaxCreditExpirationRange1Member" xlink:label="loc_ghc_ForeignTaxCreditExpirationRange1Member_B6F6D4E6A2AE65233505BE70DC6FB554" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA" xlink:to="loc_ghc_ForeignTaxCreditExpirationRange1Member_B6F6D4E6A2AE65233505BE70DC6FB554" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForeignTaxCreditExpirationRange2Member" xlink:label="loc_ghc_ForeignTaxCreditExpirationRange2Member_CA38220036812BB87A42BE70DC6F1AE8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA" xlink:to="loc_ghc_ForeignTaxCreditExpirationRange2Member_CA38220036812BB87A42BE70DC6F1AE8" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForeignTaxCreditExpirationRange3Member" xlink:label="loc_ghc_ForeignTaxCreditExpirationRange3Member_D42EB2A0CE8BF7224043BE70DC6F2074" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA" xlink:to="loc_ghc_ForeignTaxCreditExpirationRange3Member_D42EB2A0CE8BF7224043BE70DC6F2074" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForeignTaxCreditExpirationRange4Member" xlink:label="loc_ghc_ForeignTaxCreditExpirationRange4Member_AFB7891BEF513F55C361BE70DC6F0696" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_F8AAEA55FA26354AC12ABE70DC6E57BA" xlink:to="loc_ghc_ForeignTaxCreditExpirationRange4Member_AFB7891BEF513F55C361BE70DC6F0696" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_95A388DCDBB495FEBFA7BE70DC6F3587" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:to="loc_us-gaap_StatementScenarioAxis_95A388DCDBB495FEBFA7BE70DC6F3587" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_60CDC2B0E316401F7A6ABE70DC6F64DD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_95A388DCDBB495FEBFA7BE70DC6F3587" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_60CDC2B0E316401F7A6ABE70DC6F64DD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_60CDC2B0E316401F7A6ABE70DC6F64DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_95A388DCDBB495FEBFA7BE70DC6F3587" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_60CDC2B0E316401F7A6ABE70DC6F64DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioAdjustmentMember" xlink:label="loc_us-gaap_ScenarioAdjustmentMember_B04A7D375A745861D2F0BE70DC6F1C10" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_60CDC2B0E316401F7A6ABE70DC6F64DD" xlink:to="loc_us-gaap_ScenarioAdjustmentMember_B04A7D375A745861D2F0BE70DC6F1C10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_FAEE68D255BCD35F7D2DBE70DC701625" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_60CDC2B0E316401F7A6ABE70DC6F64DD" xlink:to="loc_us-gaap_ScenarioForecastMember_FAEE68D255BCD35F7D2DBE70DC701625" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_DA9C47CCE866C266E7AABE70DC70703A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_DA9C47CCE866C266E7AABE70DC70703A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_93ED9946F56971A95C64BE70DC702EAB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_DA9C47CCE866C266E7AABE70DC70703A" xlink:to="loc_us-gaap_SegmentDomain_93ED9946F56971A95C64BE70DC702EAB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_93ED9946F56971A95C64BE70DC702EAB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_DA9C47CCE866C266E7AABE70DC70703A" xlink:to="loc_us-gaap_SegmentDomain_93ED9946F56971A95C64BE70DC702EAB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_E65872EBBEB53DA26DDDBE70DC70EBEE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_93ED9946F56971A95C64BE70DC702EAB" xlink:to="loc_ghc_EducationMember_E65872EBBEB53DA26DDDBE70DC70EBEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowanceByDeferredTaxAssetAxis" xlink:label="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_A38D3345D81D5CDE1EFFBE70DC70590A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:to="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_A38D3345D81D5CDE1EFFBE70DC70590A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetDomain" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_81540CA61E295619171DBE70DC702C36_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_A38D3345D81D5CDE1EFFBE70DC70590A" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_81540CA61E295619171DBE70DC702C36_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetDomain" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_81540CA61E295619171DBE70DC702C36" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_A38D3345D81D5CDE1EFFBE70DC70590A" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_81540CA61E295619171DBE70DC702C36" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherMember" xlink:label="loc_ghc_OtherMember_2D0EEDA704EEB7D4B85CBE70DC7070D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_81540CA61E295619171DBE70DC702C36" xlink:to="loc_ghc_OtherMember_2D0EEDA704EEB7D4B85CBE70DC7070D0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TaxCreditCarryforwardsForeignMember" xlink:label="loc_ghc_TaxCreditCarryforwardsForeignMember_FA84C266655BCAE5005FBEE93CF0C1FD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_81540CA61E295619171DBE70DC702C36" xlink:to="loc_ghc_TaxCreditCarryforwardsForeignMember_FA84C266655BCAE5005FBEE93CF0C1FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_50F299DC7C04AE9802C6BE70DC70025E" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_50F299DC7C04AE9802C6BE70DC70025E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_EE7D4C731A291393E6DDBE70DC7077F9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_50F299DC7C04AE9802C6BE70DC70025E" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_EE7D4C731A291393E6DDBE70DC7077F9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_EE7D4C731A291393E6DDBE70DC7077F9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_50F299DC7C04AE9802C6BE70DC70025E" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_EE7D4C731A291393E6DDBE70DC7077F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InternalRevenueServiceIRSMember" xlink:label="loc_us-gaap_InternalRevenueServiceIRSMember_B4B6C2E557DC4DCE5EC1BE70DC70D15B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_EE7D4C731A291393E6DDBE70DC7077F9" xlink:to="loc_us-gaap_InternalRevenueServiceIRSMember_B4B6C2E557DC4DCE5EC1BE70DC70D15B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TaxActAxis" xlink:label="loc_ghc_TaxActAxis_5184A76EA93876FFDEC7BE70DC708AAB" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:to="loc_ghc_TaxActAxis_5184A76EA93876FFDEC7BE70DC708AAB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TaxActDomain" xlink:label="loc_ghc_TaxActDomain_207BF03657436230A63DBE70DC70C145_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TaxActAxis_5184A76EA93876FFDEC7BE70DC708AAB" xlink:to="loc_ghc_TaxActDomain_207BF03657436230A63DBE70DC70C145_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TaxActDomain" xlink:label="loc_ghc_TaxActDomain_207BF03657436230A63DBE70DC70C145" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TaxActAxis_5184A76EA93876FFDEC7BE70DC708AAB" xlink:to="loc_ghc_TaxActDomain_207BF03657436230A63DBE70DC70C145" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ReductionInFederalTaxRateMember" xlink:label="loc_ghc_ReductionInFederalTaxRateMember_BD4A033D0412577EECC6BE70DC70BE13" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TaxActDomain_207BF03657436230A63DBE70DC70C145" xlink:to="loc_ghc_ReductionInFederalTaxRateMember_BD4A033D0412577EECC6BE70DC70BE13" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ChangeinTaxOnNonUSSubsidiaryEarningsMember" xlink:label="loc_ghc_ChangeinTaxOnNonUSSubsidiaryEarningsMember_8A3A057DC58888268D67BE70DC700C1A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TaxActDomain_207BF03657436230A63DBE70DC70C145" xlink:to="loc_ghc_ChangeinTaxOnNonUSSubsidiaryEarningsMember_8A3A057DC58888268D67BE70DC700C1A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RecognitionPeriodAxis" xlink:label="loc_ghc_RecognitionPeriodAxis_CC7C26277E66B80B407CBE70DC713812" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_920294A06F6EEB0A5620BE70DC6D94B3" xlink:to="loc_ghc_RecognitionPeriodAxis_CC7C26277E66B80B407CBE70DC713812" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RecognitionPeriodDomain" xlink:label="loc_ghc_RecognitionPeriodDomain_64B39FF34259189C8AB0BE70DC719AB0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_RecognitionPeriodAxis_CC7C26277E66B80B407CBE70DC713812" xlink:to="loc_ghc_RecognitionPeriodDomain_64B39FF34259189C8AB0BE70DC719AB0_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RecognitionPeriodDomain" xlink:label="loc_ghc_RecognitionPeriodDomain_64B39FF34259189C8AB0BE70DC719AB0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_RecognitionPeriodAxis_CC7C26277E66B80B407CBE70DC713812" xlink:to="loc_ghc_RecognitionPeriodDomain_64B39FF34259189C8AB0BE70DC719AB0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RecognitionPeriod1Member" xlink:label="loc_ghc_RecognitionPeriod1Member_258483F1A691340D7196BE70DC714D8E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RecognitionPeriodDomain_64B39FF34259189C8AB0BE70DC719AB0" xlink:to="loc_ghc_RecognitionPeriod1Member_258483F1A691340D7196BE70DC714D8E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RecognitionPeriod2Member" xlink:label="loc_ghc_RecognitionPeriod2Member_1977D2D541691C6CDA18BE70DC710C44" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RecognitionPeriodDomain_64B39FF34259189C8AB0BE70DC719AB0" xlink:to="loc_ghc_RecognitionPeriod2Member_1977D2D541691C6CDA18BE70DC710C44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_183C4C474630429FF703BE70DC729D8E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_183C4C474630429FF703BE70DC729D8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability_0B34CB4BA458D7B07C73BE70DC72D6A8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability_0B34CB4BA458D7B07C73BE70DC72D6A8" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomeTaxReconciliationDeferredTaxAssetsWriteoff" xlink:label="loc_ghc_IncomeTaxReconciliationDeferredTaxAssetsWriteoff_BF8EA36811529CD5F9AEBE70DC72E733" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_IncomeTaxReconciliationDeferredTaxAssetsWriteoff_BF8EA36811529CD5F9AEBE70DC72E733" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_237B4888F55895B248ADBE70DC728376" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_237B4888F55895B248ADBE70DC728376" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_60043D324EB87DECADF4BE70DC72B621" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_60043D324EB87DECADF4BE70DC72B621" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomeTaxLossCarryforwardsSubjecttoExpiration" xlink:label="loc_ghc_IncomeTaxLossCarryforwardsSubjecttoExpiration_57C854FA90B426DE16B7BE70DC725152" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_IncomeTaxLossCarryforwardsSubjecttoExpiration_57C854FA90B426DE16B7BE70DC725152" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_FA33D152A370F04268EDBE70DC72A6B4" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_FA33D152A370F04268EDBE70DC72A6B4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TaxLossCarryforwardPriorStockAcquisitionUtilized" xlink:label="loc_ghc_TaxLossCarryforwardPriorStockAcquisitionUtilized_DD54F92FC84F0FA90300BE70DC724B99" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_TaxLossCarryforwardPriorStockAcquisitionUtilized_DD54F92FC84F0FA90300BE70DC724B99" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_0E17190A1EC2444823DCBE70DC722F61" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_0E17190A1EC2444823DCBE70DC722F61" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForeignTaxCreditCarryforwards" xlink:label="loc_ghc_ForeignTaxCreditCarryforwards_17177D1ABE2C0BD6E3DBBE70DC722CCC" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_ForeignTaxCreditCarryforwards_17177D1ABE2C0BD6E3DBBE70DC722CCC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DeferredTaxAssetsValuationAllowanceTaxCreditCarryforwardsForeign" xlink:label="loc_ghc_DeferredTaxAssetsValuationAllowanceTaxCreditCarryforwardsForeign_F5E966474359BEB6450BBE70DC7207BB" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_DeferredTaxAssetsValuationAllowanceTaxCreditCarryforwardsForeign_F5E966474359BEB6450BBE70DC7207BB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount" xlink:label="loc_ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount_C85141096E011180C4D7BE70DC72C652" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount_C85141096E011180C4D7BE70DC72C652" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_731FEE2369AD6F4DBD4DBE70DC73D0C2" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_731FEE2369AD6F4DBD4DBE70DC73D0C2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OperatingLossesAndPriorStockAcqusitionsCarryforward" xlink:label="loc_ghc_OperatingLossesAndPriorStockAcqusitionsCarryforward_F37C341F9612325261A5BE70DC73C908" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_OperatingLossesAndPriorStockAcqusitionsCarryforward_F37C341F9612325261A5BE70DC73C908" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_402DF347CA46F29434ECBE70DC73FF0D" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_402DF347CA46F29434ECBE70DC73FF0D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DeferredTaxAssetOperatingLossesAndPriorStockAcquisitionsCarryforwardValuationAllowance" xlink:label="loc_ghc_DeferredTaxAssetOperatingLossesAndPriorStockAcquisitionsCarryforwardValuationAllowance_D7456BB8A6AAD462A99EBE70DC73B9A9" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_DeferredTaxAssetOperatingLossesAndPriorStockAcquisitionsCarryforwardValuationAllowance_D7456BB8A6AAD462A99EBE70DC73B9A9" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OperatingLossesAndPriorStockAcqusitionsCarryforwardIndefinitely" xlink:label="loc_ghc_OperatingLossesAndPriorStockAcqusitionsCarryforwardIndefinitely_4CC3D0D66DE1B12EBAB1BE70DC73F065" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_OperatingLossesAndPriorStockAcqusitionsCarryforwardIndefinitely_4CC3D0D66DE1B12EBAB1BE70DC73F065" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OperatingLossesAndPriorStockAcqusitionsCarryforwardSubjectToExpiration" xlink:label="loc_ghc_OperatingLossesAndPriorStockAcqusitionsCarryforwardSubjectToExpiration_383CD32D635193FD2E8ABE70DC73D172" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_OperatingLossesAndPriorStockAcqusitionsCarryforwardSubjectToExpiration_383CD32D635193FD2E8ABE70DC73D172" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxCreditCarryforwardAmount" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_8CF3F840275A18764344BE70DC73B5CE" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_8CF3F840275A18764344BE70DC73B5CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsCapitalLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsCapitalLossCarryforwards_0C4DBB6A2B5E8D5E1D91BE70DC733898" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DeferredTaxAssetsCapitalLossCarryforwards_0C4DBB6A2B5E8D5E1D91BE70DC733898" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_A81F7A04E6002E1F3234BE70DC732153" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_A81F7A04E6002E1F3234BE70DC732153" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwardsValuationAllowance" xlink:label="loc_us-gaap_OperatingLossCarryforwardsValuationAllowance_C15FE56646B510AB3F87BE70DC737515" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_OperatingLossCarryforwardsValuationAllowance_C15FE56646B510AB3F87BE70DC737515" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_E3265E4EF6A736F389F0BE70DC739D66" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_E3265E4EF6A736F389F0BE70DC739D66" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_97D05CA554D53CC011C7BE70DC739D17" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_97D05CA554D53CC011C7BE70DC739D17" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ExcessOfBookValueOverTaxBasisOfInvestment" xlink:label="loc_ghc_ExcessOfBookValueOverTaxBasisOfInvestment_721641AB674C011E9428BE70DC73105A" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_ExcessOfBookValueOverTaxBasisOfInvestment_721641AB674C011E9428BE70DC73105A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_349C3E598C5852ED5114BE70DC73E566" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_349C3E598C5852ED5114BE70DC73E566" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority" xlink:label="loc_us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority_F7190D96317641402246BE70DC74EA3F" xlink:type="locator" />
    <link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority_F7190D96317641402246BE70DC74EA3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible" xlink:label="loc_us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible_671F448A79584460D0A1BE70DC747F94" xlink:type="locator" />
    <link:definitionArc order="28" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible_671F448A79584460D0A1BE70DC747F94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_475A53B12F5E10A08837BE70DC742DC2" xlink:type="locator" />
    <link:definitionArc order="29" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_475A53B12F5E10A08837BE70DC742DC2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_FederalTaxImpactOfUnrecognizedTaxBenefitsthatWouldImpactEffectiveTaxRate" xlink:label="loc_ghc_FederalTaxImpactOfUnrecognizedTaxBenefitsthatWouldImpactEffectiveTaxRate_8C557D383AED21EC952ABE70DC744FCA" xlink:type="locator" />
    <link:definitionArc order="30" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_ghc_FederalTaxImpactOfUnrecognizedTaxBenefitsthatWouldImpactEffectiveTaxRate_8C557D383AED21EC952ABE70DC744FCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_CEBF3301D6B74DF9C14EBE70DC7422F2" xlink:type="locator" />
    <link:definitionArc order="31" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_CEBF3301D6B74DF9C14EBE70DC7422F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued_AFC9573DC68492048D8DBE70DC759757" xlink:type="locator" />
    <link:definitionArc order="32" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_IncomeTaxesLineItems_0A55B7FC6C0370062039BE70DC722323" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued_AFC9573DC68492048D8DBE70DC759757" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxesOperatingLossCarryforwardsDetails5" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_C321F4A79F5AABAF97D4BA0AB8503993" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_62DE16F96868B44A6C93BA0AB84FD8B0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_C321F4A79F5AABAF97D4BA0AB8503993" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_62DE16F96868B44A6C93BA0AB84FD8B0" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CarryforwardsPeriodAxis" xlink:label="loc_ghc_CarryforwardsPeriodAxis_19E4B877F1577C46A54DBA0AB84F2147" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_62DE16F96868B44A6C93BA0AB84FD8B0" xlink:to="loc_ghc_CarryforwardsPeriodAxis_19E4B877F1577C46A54DBA0AB84F2147" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CarryforwardPeriodDomain" xlink:label="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_CarryforwardsPeriodAxis_19E4B877F1577C46A54DBA0AB84F2147" xlink:to="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CarryforwardPeriodDomain" xlink:label="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_CarryforwardsPeriodAxis_19E4B877F1577C46A54DBA0AB84F2147" xlink:to="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LossCarryForwardsExpirationsYearOneMember" xlink:label="loc_ghc_LossCarryForwardsExpirationsYearOneMember_9CD6D2A7902C514207F5BA0AB850EAD0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6" xlink:to="loc_ghc_LossCarryForwardsExpirationsYearOneMember_9CD6D2A7902C514207F5BA0AB850EAD0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LossCarryForwardsExpirationsYearTwoMember" xlink:label="loc_ghc_LossCarryForwardsExpirationsYearTwoMember_46772BD7BEF8586BC36ABA0AB8504E0B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6" xlink:to="loc_ghc_LossCarryForwardsExpirationsYearTwoMember_46772BD7BEF8586BC36ABA0AB8504E0B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LossCarryForwardsExpirationsYearThreeMember" xlink:label="loc_ghc_LossCarryForwardsExpirationsYearThreeMember_98A7852E71CF9767D5B2BA0AB8507935" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6" xlink:to="loc_ghc_LossCarryForwardsExpirationsYearThreeMember_98A7852E71CF9767D5B2BA0AB8507935" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LossCarryForwardsExpirationsYearFourMember" xlink:label="loc_ghc_LossCarryForwardsExpirationsYearFourMember_224D1C09EC0F5ABC48B6BA0AB8502D43" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6" xlink:to="loc_ghc_LossCarryForwardsExpirationsYearFourMember_224D1C09EC0F5ABC48B6BA0AB8502D43" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LossCarryForwardsExpirationsYearFiveMember" xlink:label="loc_ghc_LossCarryForwardsExpirationsYearFiveMember_2ED06B6EB34B35D1DA4BBA0AB8508307" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6" xlink:to="loc_ghc_LossCarryForwardsExpirationsYearFiveMember_2ED06B6EB34B35D1DA4BBA0AB8508307" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LossCarryForwardsExpirationsAfterYearFiveMember" xlink:label="loc_ghc_LossCarryForwardsExpirationsAfterYearFiveMember_ADDC2A78283F9C209009BA0AB85045C9" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_CarryforwardPeriodDomain_27222CA9CE925E76B5CEBA0AB8507FE6" xlink:to="loc_ghc_LossCarryForwardsExpirationsAfterYearFiveMember_ADDC2A78283F9C209009BA0AB85045C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_436F7D13082B4980033BBA0AB8502B3D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_62DE16F96868B44A6C93BA0AB84FD8B0" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_436F7D13082B4980033BBA0AB8502B3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_17B99A94FFC0D2AE8AFBBA0AB8507842_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_436F7D13082B4980033BBA0AB8502B3D" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_17B99A94FFC0D2AE8AFBBA0AB8507842_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_17B99A94FFC0D2AE8AFBBA0AB8507842" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_436F7D13082B4980033BBA0AB8502B3D" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_17B99A94FFC0D2AE8AFBBA0AB8507842" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_669CAAE692BCA5C73655BA0AB8506C6A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_17B99A94FFC0D2AE8AFBBA0AB8507842" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_669CAAE692BCA5C73655BA0AB8506C6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_40F7CDC091E4DD2441A2BA0AB8506F36" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_17B99A94FFC0D2AE8AFBBA0AB8507842" xlink:to="loc_us-gaap_DomesticCountryMember_40F7CDC091E4DD2441A2BA0AB8506F36" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_DA8EE0DFE8F86BB818FCBA0AB850780F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_17B99A94FFC0D2AE8AFBBA0AB8507842" xlink:to="loc_us-gaap_ForeignCountryMember_DA8EE0DFE8F86BB818FCBA0AB850780F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomeTaxLossCarryforwardsSubjecttoExpiration" xlink:label="loc_ghc_IncomeTaxLossCarryforwardsSubjecttoExpiration_83AB801D482E95BC0601BA0AB85016AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_C321F4A79F5AABAF97D4BA0AB8503993" xlink:to="loc_ghc_IncomeTaxLossCarryforwardsSubjecttoExpiration_83AB801D482E95BC0601BA0AB85016AD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TaxLossCarryforwardPriorStockAcquisitionUtilized" xlink:label="loc_ghc_TaxLossCarryforwardPriorStockAcquisitionUtilized_E246EAB1F0F69FAE0CCEBA0AB850E90A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_C321F4A79F5AABAF97D4BA0AB8503993" xlink:to="loc_ghc_TaxLossCarryforwardPriorStockAcquisitionUtilized_E246EAB1F0F69FAE0CCEBA0AB850E90A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxesProvisionForIncomeTaxesComponentsDetails2" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/IncomeTaxesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_6C10283464B726643A38BA0AB87EAB04" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IncomeTaxesTable" xlink:label="loc_ghc_IncomeTaxesTable_C5ED32D99C36DE57D9C6BA0AB87D353B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_6C10283464B726643A38BA0AB87EAB04" xlink:to="loc_ghc_IncomeTaxesTable_C5ED32D99C36DE57D9C6BA0AB87D353B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_75131F987AAEF927F0F8BA0AB87D7D4D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_IncomeTaxesTable_C5ED32D99C36DE57D9C6BA0AB87D353B" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_75131F987AAEF927F0F8BA0AB87D7D4D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_ECE066FEDEB544F9349EBA0AB87EDF13_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_75131F987AAEF927F0F8BA0AB87D7D4D" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_ECE066FEDEB544F9349EBA0AB87EDF13_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_ECE066FEDEB544F9349EBA0AB87EDF13" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_75131F987AAEF927F0F8BA0AB87D7D4D" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_ECE066FEDEB544F9349EBA0AB87EDF13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_7DB861D4E3F0503B9852BA0AB87E029F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_ECE066FEDEB544F9349EBA0AB87EDF13" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_7DB861D4E3F0503B9852BA0AB87E029F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_751606D8F56D302EFC40BA0AB87E18CD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_ECE066FEDEB544F9349EBA0AB87EDF13" xlink:to="loc_us-gaap_DomesticCountryMember_751606D8F56D302EFC40BA0AB87E18CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_B9EE0E6C9DF84159AD9ABA0AB87EAC22" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_ECE066FEDEB544F9349EBA0AB87EDF13" xlink:to="loc_us-gaap_ForeignCountryMember_B9EE0E6C9DF84159AD9ABA0AB87EAC22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock_3361CFB9FB871BEDBA36BA0AB87E473C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6C10283464B726643A38BA0AB87EAB04" xlink:to="loc_us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock_3361CFB9FB871BEDBA36BA0AB87E473C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_FC50A9AF1D0B4D504BE3BA0AB87E30DB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6C10283464B726643A38BA0AB87EAB04" xlink:to="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_FC50A9AF1D0B4D504BE3BA0AB87E30DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_18F4DDCE42DF412E2166BA0AB87EA406" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6C10283464B726643A38BA0AB87EAB04" xlink:to="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_18F4DDCE42DF412E2166BA0AB87EA406" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_E4DD996DAFA827A6F816BA0AB87E4D2C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6C10283464B726643A38BA0AB87EAB04" xlink:to="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_E4DD996DAFA827A6F816BA0AB87E4D2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock" xlink:label="loc_us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock_447D0F490E51EBC14DFFBA0AB87FB4C9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6C10283464B726643A38BA0AB87EAB04" xlink:to="loc_us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock_447D0F490E51EBC14DFFBA0AB87FB4C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SummaryOfValuationAllowanceTextBlock" xlink:label="loc_us-gaap_SummaryOfValuationAllowanceTextBlock_B644F2250876E0B06BA9BA0AB87F1EC5" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6C10283464B726643A38BA0AB87EAB04" xlink:to="loc_us-gaap_SummaryOfValuationAllowanceTextBlock_B644F2250876E0B06BA9BA0AB87F1EC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfUnrecognizedTaxBenefitsRollForwardTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfUnrecognizedTaxBenefitsRollForwardTableTextBlock_E7D2758EF4B7AC1C02B5BA0AB87F4017" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6C10283464B726643A38BA0AB87EAB04" xlink:to="loc_us-gaap_ScheduleOfUnrecognizedTaxBenefitsRollForwardTableTextBlock_E7D2758EF4B7AC1C02B5BA0AB87F4017" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/InventoriesAndContractsInProgress" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/InventoriesAndContractsInProgressDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/InventoriesAndContractsInProgressTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/Investments" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/InvestmentsInvestmentsInMarketableEquitySecuritiesDetails1" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/InvestmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_9043D2BDF3E953A47B0FBA0AB8D27D69" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_9043D2BDF3E953A47B0FBA0AB8D27D69" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionAxis" xlink:label="loc_ghc_TransactionAxis_D2E60C147A3035EDC959BA0AB8D2F3A3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_9043D2BDF3E953A47B0FBA0AB8D27D69" xlink:to="loc_ghc_TransactionAxis_D2E60C147A3035EDC959BA0AB8D2F3A3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_7971BA89E6E9E9DA9363BA0AB8D207C1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TransactionAxis_D2E60C147A3035EDC959BA0AB8D2F3A3" xlink:to="loc_ghc_TransactionTypeDomain_7971BA89E6E9E9DA9363BA0AB8D207C1_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_7971BA89E6E9E9DA9363BA0AB8D207C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TransactionAxis_D2E60C147A3035EDC959BA0AB8D2F3A3" xlink:to="loc_ghc_TransactionTypeDomain_7971BA89E6E9E9DA9363BA0AB8D207C1" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BerkshireExchangeTransactionMember" xlink:label="loc_ghc_BerkshireExchangeTransactionMember_C6AAD4C1ACA1CD5C22D8BA0AB8D2A1BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_7971BA89E6E9E9DA9363BA0AB8D207C1" xlink:to="loc_ghc_BerkshireExchangeTransactionMember_C6AAD4C1ACA1CD5C22D8BA0AB8D2A1BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_2B376975C269692007A0BA0AB8D297B5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_9043D2BDF3E953A47B0FBA0AB8D27D69" xlink:to="loc_dei_LegalEntityAxis_2B376975C269692007A0BA0AB8D297B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6C9CF66A36099CB12723BA0AB8D2F6A1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2B376975C269692007A0BA0AB8D297B5" xlink:to="loc_dei_EntityDomain_6C9CF66A36099CB12723BA0AB8D2F6A1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6C9CF66A36099CB12723BA0AB8D2F6A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2B376975C269692007A0BA0AB8D297B5" xlink:to="loc_dei_EntityDomain_6C9CF66A36099CB12723BA0AB8D2F6A1" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GrahamHealthcareGroupMember" xlink:label="loc_ghc_GrahamHealthcareGroupMember_5EC414646020E122B2FDBA0AB8D23AD8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6C9CF66A36099CB12723BA0AB8D2F6A1" xlink:to="loc_ghc_GrahamHealthcareGroupMember_5EC414646020E122B2FDBA0AB8D23AD8" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BerkshireHathawayIncMember" xlink:label="loc_ghc_BerkshireHathawayIncMember_8D5EC60BDD477D5C8BC5BA0AB8D28DB8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6C9CF66A36099CB12723BA0AB8D2F6A1" xlink:to="loc_ghc_BerkshireHathawayIncMember_8D5EC60BDD477D5C8BC5BA0AB8D28DB8" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_YorkUniversityMember" xlink:label="loc_ghc_YorkUniversityMember_0183E350FB01F4C5E853BA0AB8D2F63E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6C9CF66A36099CB12723BA0AB8D2F6A1" xlink:to="loc_ghc_YorkUniversityMember_0183E350FB01F4C5E853BA0AB8D2F63E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_4D3A5150B1E8E0E7D9B7BA0AB8D24C70" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_9043D2BDF3E953A47B0FBA0AB8D27D69" xlink:to="loc_us-gaap_StatementClassOfStockAxis_4D3A5150B1E8E0E7D9B7BA0AB8D24C70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_B0DC3E6BC4869EEB8190BA0AB8D2DCED_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_4D3A5150B1E8E0E7D9B7BA0AB8D24C70" xlink:to="loc_us-gaap_ClassOfStockDomain_B0DC3E6BC4869EEB8190BA0AB8D2DCED_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_B0DC3E6BC4869EEB8190BA0AB8D2DCED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_4D3A5150B1E8E0E7D9B7BA0AB8D24C70" xlink:to="loc_us-gaap_ClassOfStockDomain_B0DC3E6BC4869EEB8190BA0AB8D2DCED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_9B4D70BE285ECCE340ECBA0AB8D29D87" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_B0DC3E6BC4869EEB8190BA0AB8D2DCED" xlink:to="loc_us-gaap_CommonClassAMember_9B4D70BE285ECCE340ECBA0AB8D29D87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_CBE617E1AE7EEF02A747BA0AB8D23C46" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_B0DC3E6BC4869EEB8190BA0AB8D2DCED" xlink:to="loc_us-gaap_CommonClassBMember_CBE617E1AE7EEF02A747BA0AB8D23C46" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_C745E30765605DCFCFC8BA0AB8D356BF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_9043D2BDF3E953A47B0FBA0AB8D27D69" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_C745E30765605DCFCFC8BA0AB8D356BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_C745E30765605DCFCFC8BA0AB8D356BF" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_C745E30765605DCFCFC8BA0AB8D356BF" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_MarkelCorporationMember" xlink:label="loc_ghc_MarkelCorporationMember_5E8F68E0C09234BBE1B9BA0AB8D374AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_MarkelCorporationMember_5E8F68E0C09234BBE1B9BA0AB8D374AF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_IntersectionMember" xlink:label="loc_ghc_IntersectionMember_D19FCF2E4BCBAD34C55ABA0AB8D3B99F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_IntersectionMember_D19FCF2E4BCBAD34C55ABA0AB8D3B99F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialHomeHealthIllinoisMember" xlink:label="loc_ghc_ResidentialHomeHealthIllinoisMember_C42695165B04D21A181CBA0AB8D39BC8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_ResidentialHomeHealthIllinoisMember_C42695165B04D21A181CBA0AB8D39BC8" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialHospiceIllinoisMember" xlink:label="loc_ghc_ResidentialHospiceIllinoisMember_447881448E20700BC80CBA0AB8D3493E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_ResidentialHospiceIllinoisMember_447881448E20700BC80CBA0AB8D3493E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialAndMichiganHospitalJointVentureMember" xlink:label="loc_ghc_ResidentialAndMichiganHospitalJointVentureMember_5921AEBA8373B718D44EBA0AB8D3765F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_ResidentialAndMichiganHospitalJointVentureMember_5921AEBA8373B718D44EBA0AB8D3765F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember" xlink:label="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_668E71E46B07C38EDCC3BA0AB8D316DC" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_668E71E46B07C38EDCC3BA0AB8D316DC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ClassifiedVenturessaleofapartments.comMember" xlink:label="loc_ghc_ClassifiedVenturessaleofapartments.comMember_716DAE5DC4A8E8512D31BA0AB8D30BD4" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_ClassifiedVenturessaleofapartments.comMember_716DAE5DC4A8E8512D31BA0AB8D30BD4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ClassifiedVenturesLlcMember" xlink:label="loc_ghc_ClassifiedVenturesLlcMember_72748459811FE6F66730BA0AB8D3ED0F" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_ClassifiedVenturesLlcMember_72748459811FE6F66730BA0AB8D3ED0F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_YorkJointVentureMember" xlink:label="loc_ghc_YorkJointVentureMember_F73ABFE41B3D9B616F51BA0AB8D397D0" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_YorkJointVentureMember_F73ABFE41B3D9B616F51BA0AB8D397D0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HomeHeroMember" xlink:label="loc_ghc_HomeHeroMember_691A2C6449DC98097208BA0AB8D3D884" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_5CFBAFFEDBFAE2C7315CBA0AB8D35FB9" xlink:to="loc_ghc_HomeHeroMember_691A2C6449DC98097208BA0AB8D3D884" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CommercialPaperAndMoneyMarketInvestments" xlink:label="loc_ghc_CommercialPaperAndMoneyMarketInvestments_5F55D51DB53220EAC96EBA0AB8D368D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_CommercialPaperAndMoneyMarketInvestments_5F55D51DB53220EAC96EBA0AB8D368D4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfSharesHeldInInvestment" xlink:label="loc_ghc_NumberOfSharesHeldInInvestment_A836721B9E4F9B9B56ABBA0AB8D30E3F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_NumberOfSharesHeldInInvestment_A836721B9E4F9B9B56ABBA0AB8D30E3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesEquitySecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_D349BF6E1ED04BFD600EBA0AB8D367FD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_D349BF6E1ED04BFD600EBA0AB8D367FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_A5FD99A4BCEBF987DD70BA0AB8D3453B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_A5FD99A4BCEBF987DD70BA0AB8D3453B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds_2384EBF174526F188B0EBA0AB8D38EBB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds_2384EBF174526F188B0EBA0AB8D38EBB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AvailableForSaleSecuritiesEquityAcquired" xlink:label="loc_ghc_AvailableForSaleSecuritiesEquityAcquired_00AD0B36E8CC2F540F34BA0AB8D3C7B3" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_AvailableForSaleSecuritiesEquityAcquired_00AD0B36E8CC2F540F34BA0AB8D3C7B3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_MarketableSecuritiesRealizedLossExcludingOtherthanTemporaryImpairments" xlink:label="loc_ghc_MarketableSecuritiesRealizedLossExcludingOtherthanTemporaryImpairments_45B04B6C170496F26066BA0AB8D43660" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_MarketableSecuritiesRealizedLossExcludingOtherthanTemporaryImpairments_45B04B6C170496F26066BA0AB8D43660" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments" xlink:label="loc_us-gaap_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments_A70C8F9DC35E3576EE6DBA0AB8D4DB01" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments_A70C8F9DC35E3576EE6DBA0AB8D4DB01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:label="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions_16A4593D65A0408B72FFBA0AB8D49AC9" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions_16A4593D65A0408B72FFBA0AB8D49AC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_36CDC52E099693571FF1BA0AB8D47A7D" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_36CDC52E099693571FF1BA0AB8D47A7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevenueFromRelatedParties" xlink:label="loc_us-gaap_RevenueFromRelatedParties_A82CA52F7DC82DCEE87DBA0AB8D42E8F" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_RevenueFromRelatedParties_A82CA52F7DC82DCEE87DBA0AB8D42E8F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherCommitment" xlink:label="loc_us-gaap_OtherCommitment_B458F1A70BFF3B791880BA0AB8D4042A" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_OtherCommitment_B458F1A70BFF3B791880BA0AB8D4042A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LoanReceivablePaymentTerms" xlink:label="loc_ghc_LoanReceivablePaymentTerms_CA71FABF713B4A65033CBA0AB8D40650" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_LoanReceivablePaymentTerms_CA71FABF713B4A65033CBA0AB8D40650" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionRate" xlink:label="loc_us-gaap_RelatedPartyTransactionRate_9F9F19AAC15761542487BA0AB8D400CF" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_RelatedPartyTransactionRate_9F9F19AAC15761542487BA0AB8D400CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdvancesToAffiliate" xlink:label="loc_us-gaap_AdvancesToAffiliate_57A438C6B78FFD65EBB0BA0AB8D4E794" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_AdvancesToAffiliate_57A438C6B78FFD65EBB0BA0AB8D4E794" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment" xlink:label="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_CE43D2A2020EDAE5C1DDBA0AB8D4EFFF" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_CE43D2A2020EDAE5C1DDBA0AB8D4EFFF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_LoanReceivableFixedInterestRate" xlink:label="loc_ghc_LoanReceivableFixedInterestRate_A126DB7ECF624580FBE2BA0AB8D4E7B1" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_LoanReceivableFixedInterestRate_A126DB7ECF624580FBE2BA0AB8D4E7B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NotesReceivableRelatedPartiesNoncurrent" xlink:label="loc_us-gaap_NotesReceivableRelatedPartiesNoncurrent_1B31BAD891ED464D09B5BA0AB8D4302E" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_NotesReceivableRelatedPartiesNoncurrent_1B31BAD891ED464D09B5BA0AB8D4302E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_D5515B4987964AEE9348BA0AB8D487AD" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_D5515B4987964AEE9348BA0AB8D487AD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ProceedsFromSaleOfEquityMethodInvestmentsIncludingEscrow" xlink:label="loc_ghc_ProceedsFromSaleOfEquityMethodInvestmentsIncludingEscrow_020FD4CC7985D9E53EF4BA0AB8D4404D" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_ProceedsFromSaleOfEquityMethodInvestmentsIncludingEscrow_020FD4CC7985D9E53EF4BA0AB8D4404D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfEquityMethodInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_780F45D5EDBA8EAB1241BA0AB8D48848" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_780F45D5EDBA8EAB1241BA0AB8D48848" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal" xlink:label="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_465EC4BED7F600442CD1BA0AB8D4FD53" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_465EC4BED7F600442CD1BA0AB8D4FD53" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GainonShareExchange" xlink:label="loc_ghc_GainonShareExchange_1A0993AC5B4ADB58DCB9BA0AB8D4A7EB" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_GainonShareExchange_1A0993AC5B4ADB58DCB9BA0AB8D4A7EB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EquityMethodInvestmentCashDistributions" xlink:label="loc_ghc_EquityMethodInvestmentCashDistributions_8BCB49650A1682B732D9BA0AB8D4310B" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_EquityMethodInvestmentCashDistributions_8BCB49650A1682B732D9BA0AB8D4310B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_7151F5760765324C8623BA0AB8D528AF" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_7151F5760765324C8623BA0AB8D528AF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberofSharesExchanged" xlink:label="loc_ghc_NumberofSharesExchanged_C835E1BE827042C8EE87BA0AB8D54FF5" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_ghc_NumberofSharesExchanged_C835E1BE827042C8EE87BA0AB8D54FF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:label="loc_us-gaap_DebtInstrumentTerm_419C72532A2B65773E9BBA0AB8D52CF3" xlink:type="locator" />
    <link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_2D817E758BE7CBB14A9CBA0AB8D3CB52" xlink:to="loc_us-gaap_DebtInstrumentTerm_419C72532A2B65773E9BBA0AB8D52CF3" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/InvestmentsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/LeasesAndOtherCommitments" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/LeasesAndOtherCommitmentsDetails1" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/LeasesAndOtherCommitmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasedAssetsLineItems" xlink:label="loc_us-gaap_OperatingLeasedAssetsLineItems_355A09871DA8654116BCBA0AB636787D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfOperatingLeasedAssetsTable" xlink:label="loc_us-gaap_ScheduleOfOperatingLeasedAssetsTable_BDC961722585AEF59B64BA0AB6356C9D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_355A09871DA8654116BCBA0AB636787D" xlink:to="loc_us-gaap_ScheduleOfOperatingLeasedAssetsTable_BDC961722585AEF59B64BA0AB6356C9D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_5054B7A8E39FACA9B925BA0AB635A4F0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfOperatingLeasedAssetsTable_BDC961722585AEF59B64BA0AB6356C9D" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_5054B7A8E39FACA9B925BA0AB635A4F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_26A662A8F0E7F80CB045BA0AB63573E9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5054B7A8E39FACA9B925BA0AB635A4F0" xlink:to="loc_us-gaap_SegmentDomain_26A662A8F0E7F80CB045BA0AB63573E9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_26A662A8F0E7F80CB045BA0AB63573E9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5054B7A8E39FACA9B925BA0AB635A4F0" xlink:to="loc_us-gaap_SegmentDomain_26A662A8F0E7F80CB045BA0AB63573E9" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TelevisionBroadcastingMember" xlink:label="loc_ghc_TelevisionBroadcastingMember_AA0CBC6826660D71957FBA0AB6358DD2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_26A662A8F0E7F80CB045BA0AB63573E9" xlink:to="loc_ghc_TelevisionBroadcastingMember_AA0CBC6826660D71957FBA0AB6358DD2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals_B86F03D36F6D2748E6E0BA0AB6362905" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_355A09871DA8654116BCBA0AB636787D" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals_B86F03D36F6D2748E6E0BA0AB6362905" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_us-gaap_LeaseAndRentalExpense_BCA21393D8553E60DFA5BA0AB636117D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_355A09871DA8654116BCBA0AB636787D" xlink:to="loc_us-gaap_LeaseAndRentalExpense_BCA21393D8553E60DFA5BA0AB636117D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue" xlink:label="loc_us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue_8B2E3AE6A1B7495D79D5BA0AB6366D7A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_355A09871DA8654116BCBA0AB636787D" xlink:to="loc_us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue_8B2E3AE6A1B7495D79D5BA0AB6366D7A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SecondarilyLiableLeases" xlink:label="loc_ghc_SecondarilyLiableLeases_A270846520B7E9E2656BBA0AB6366312" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_355A09871DA8654116BCBA0AB636787D" xlink:to="loc_ghc_SecondarilyLiableLeases_A270846520B7E9E2656BBA0AB6366312" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentAmount" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentAmount_D4A69DD669CE02F152A4BA0AB6367282" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_355A09871DA8654116BCBA0AB636787D" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentAmount_D4A69DD669CE02F152A4BA0AB6367282" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/LeasesAndOtherCommitmentsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/OrganizationAndNatureOfOperations" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/OrganizationAndNatureOfOperationsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductInformationLineItems" xlink:label="loc_us-gaap_ProductInformationLineItems_BEFE40155EBA33CF3651BA0AB960410D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfProductInformationTable" xlink:label="loc_us-gaap_ScheduleOfProductInformationTable_BA1567CC1DB76F9BF6AFBA0AB95F9BAB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductInformationLineItems_BEFE40155EBA33CF3651BA0AB960410D" xlink:to="loc_us-gaap_ScheduleOfProductInformationTable_BA1567CC1DB76F9BF6AFBA0AB95F9BAB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_E68777F078E9541CCA06BA0AB95F07CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_BA1567CC1DB76F9BF6AFBA0AB95F9BAB" xlink:to="loc_us-gaap_StatementGeographicalAxis_E68777F078E9541CCA06BA0AB95F07CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_B34D9812A13FBF33B527BA0AB95F728F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_E68777F078E9541CCA06BA0AB95F07CC" xlink:to="loc_us-gaap_SegmentGeographicalDomain_B34D9812A13FBF33B527BA0AB95F728F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_B34D9812A13FBF33B527BA0AB95F728F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_E68777F078E9541CCA06BA0AB95F07CC" xlink:to="loc_us-gaap_SegmentGeographicalDomain_B34D9812A13FBF33B527BA0AB95F728F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_JacksonvilleFLMember" xlink:label="loc_ghc_JacksonvilleFLMember_E89835FA6D8D625AD002BA0AB95FA70D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_B34D9812A13FBF33B527BA0AB95F728F" xlink:to="loc_ghc_JacksonvilleFLMember_E89835FA6D8D625AD002BA0AB95FA70D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_111B1061590C62C40457BA0AB95FDE35" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_BA1567CC1DB76F9BF6AFBA0AB95F9BAB" xlink:to="loc_dei_LegalEntityAxis_111B1061590C62C40457BA0AB95FDE35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_95830FE842C05751A5A4BA0AB95F2F1C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_111B1061590C62C40457BA0AB95FDE35" xlink:to="loc_dei_EntityDomain_95830FE842C05751A5A4BA0AB95F2F1C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_95830FE842C05751A5A4BA0AB95F2F1C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_111B1061590C62C40457BA0AB95FDE35" xlink:to="loc_dei_EntityDomain_95830FE842C05751A5A4BA0AB95F2F1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_9282604596714504D1D3BA0AB95F4E1B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_BA1567CC1DB76F9BF6AFBA0AB95F9BAB" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_9282604596714504D1D3BA0AB95F4E1B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_9ECE5E1A6C4B73CF26A1BA0AB95F673A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9282604596714504D1D3BA0AB95F4E1B" xlink:to="loc_us-gaap_SegmentDomain_9ECE5E1A6C4B73CF26A1BA0AB95F673A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_9ECE5E1A6C4B73CF26A1BA0AB95F673A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9282604596714504D1D3BA0AB95F4E1B" xlink:to="loc_us-gaap_SegmentDomain_9ECE5E1A6C4B73CF26A1BA0AB95F673A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_452332FCDC469F440D3ABA0AB96031C2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9ECE5E1A6C4B73CF26A1BA0AB95F673A" xlink:to="loc_ghc_EducationMember_452332FCDC469F440D3ABA0AB96031C2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TelevisionBroadcastingMember" xlink:label="loc_ghc_TelevisionBroadcastingMember_B35CE6E3324DA016EEFFBA0AB9607CE6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9ECE5E1A6C4B73CF26A1BA0AB95F673A" xlink:to="loc_ghc_TelevisionBroadcastingMember_B35CE6E3324DA016EEFFBA0AB9607CE6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfEducationBusinessCategories" xlink:label="loc_ghc_NumberOfEducationBusinessCategories_70BE3A9FB719D7CB068FBA0AB9607CEF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_BEFE40155EBA33CF3651BA0AB960410D" xlink:to="loc_ghc_NumberOfEducationBusinessCategories_70BE3A9FB719D7CB068FBA0AB9607CEF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfTelevisionBroadcastStationsOwned" xlink:label="loc_ghc_NumberOfTelevisionBroadcastStationsOwned_48D149ED79A40BF66A5EBA0AB9602A9A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_BEFE40155EBA33CF3651BA0AB960410D" xlink:to="loc_ghc_NumberOfTelevisionBroadcastStationsOwned_48D149ED79A40BF66A5EBA0AB9602A9A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/OtherNonOperatingExpenseIncome" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/OtherNonOperatingExpenseIncomeNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ScheduleofNonOperatingIncomeExpenseLineItems" xlink:label="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ScheduleofNonOperatingIncomeExpenseTable" xlink:label="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_0E57316F6B041385C50CBA0AB6DAFE97" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_0E57316F6B041385C50CBA0AB6DAFE97" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_C5D8AEC458662D2514B0BA0AB6DA4E41" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_0E57316F6B041385C50CBA0AB6DAFE97" xlink:to="loc_us-gaap_SubsegmentsAxis_C5D8AEC458662D2514B0BA0AB6DA4E41" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_AE65AFF40A5A34FC0210BA0AB6DABE20_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_C5D8AEC458662D2514B0BA0AB6DA4E41" xlink:to="loc_us-gaap_SubsegmentsDomain_AE65AFF40A5A34FC0210BA0AB6DABE20_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_AE65AFF40A5A34FC0210BA0AB6DABE20" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_C5D8AEC458662D2514B0BA0AB6DA4E41" xlink:to="loc_us-gaap_SubsegmentsDomain_AE65AFF40A5A34FC0210BA0AB6DABE20" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanCorporateAndOtherMember" xlink:label="loc_ghc_KaplanCorporateAndOtherMember_F3664F2E94DF06F461E0BA0AB6DA68BD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_AE65AFF40A5A34FC0210BA0AB6DABE20" xlink:to="loc_ghc_KaplanCorporateAndOtherMember_F3664F2E94DF06F461E0BA0AB6DA68BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_48F442F7706B708429F2BA0AB6DA6184" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_0E57316F6B041385C50CBA0AB6DAFE97" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_48F442F7706B708429F2BA0AB6DA6184" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_281EB9110C8D250E8B88BA0AB6DA5685_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_48F442F7706B708429F2BA0AB6DA6184" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_281EB9110C8D250E8B88BA0AB6DA5685_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_281EB9110C8D250E8B88BA0AB6DA5685" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_48F442F7706B708429F2BA0AB6DA6184" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_281EB9110C8D250E8B88BA0AB6DA5685" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ClassifiedVenturesLlcMember" xlink:label="loc_ghc_ClassifiedVenturesLlcMember_BED447894BBB5581DE08BA0AB6DAD71A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_281EB9110C8D250E8B88BA0AB6DA5685" xlink:to="loc_ghc_ClassifiedVenturesLlcMember_BED447894BBB5581DE08BA0AB6DAD71A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember" xlink:label="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_D6F0B71DA63037FEBD36BA0AB6DA1E29" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_281EB9110C8D250E8B88BA0AB6DA5685" xlink:to="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_D6F0B71DA63037FEBD36BA0AB6DA1E29" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_VocationalSchoolCompanyMember" xlink:label="loc_ghc_VocationalSchoolCompanyMember_8B48E9579B6597E2D0B8BA0AB6DB48E8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_281EB9110C8D250E8B88BA0AB6DA5685" xlink:to="loc_ghc_VocationalSchoolCompanyMember_8B48E9579B6597E2D0B8BA0AB6DB48E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_29FC92D6F616287547FEBA0AB6DB1A84" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_0E57316F6B041385C50CBA0AB6DAFE97" xlink:to="loc_dei_LegalEntityAxis_29FC92D6F616287547FEBA0AB6DB1A84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_8A7C4AD8E9674E9B6C50BA0AB6DB1D4D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_29FC92D6F616287547FEBA0AB6DB1A84" xlink:to="loc_dei_EntityDomain_8A7C4AD8E9674E9B6C50BA0AB6DB1D4D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_8A7C4AD8E9674E9B6C50BA0AB6DB1D4D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_29FC92D6F616287547FEBA0AB6DB1A84" xlink:to="loc_dei_EntityDomain_8A7C4AD8E9674E9B6C50BA0AB6DB1D4D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialHealthcareGroupIncMember" xlink:label="loc_ghc_ResidentialHealthcareGroupIncMember_8A3097DDE66C76FF6339BA0AB6DBB765" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8A7C4AD8E9674E9B6C50BA0AB6DB1D4D" xlink:to="loc_ghc_ResidentialHealthcareGroupIncMember_8A3097DDE66C76FF6339BA0AB6DBB765" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ClassifiedVenturesLlcMember" xlink:label="loc_ghc_ClassifiedVenturesLlcMember_9E3701E0F78A1FA7BDEDBA0AB6DB27A2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8A7C4AD8E9674E9B6C50BA0AB6DB1D4D" xlink:to="loc_ghc_ClassifiedVenturesLlcMember_9E3701E0F78A1FA7BDEDBA0AB6DB27A2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CelticHealthcareIncMember" xlink:label="loc_ghc_CelticHealthcareIncMember_2E824947D9E1400833A0BA0AB6DB710F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8A7C4AD8E9674E9B6C50BA0AB6DB1D4D" xlink:to="loc_ghc_CelticHealthcareIncMember_2E824947D9E1400833A0BA0AB6DB710F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BerkshireHathawayIncMember" xlink:label="loc_ghc_BerkshireHathawayIncMember_F504FE5BD27772F9A676BA0AB6DBC652" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8A7C4AD8E9674E9B6C50BA0AB6DB1D4D" xlink:to="loc_ghc_BerkshireHathawayIncMember_F504FE5BD27772F9A676BA0AB6DBC652" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ColloquyMember" xlink:label="loc_ghc_ColloquyMember_4B84A6FA0152C64A71FEBA0AB6DB632A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8A7C4AD8E9674E9B6C50BA0AB6DB1D4D" xlink:to="loc_ghc_ColloquyMember_4B84A6FA0152C64A71FEBA0AB6DB632A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_21D4A1D18A1713FE2C35BA0AB6DBE4CA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_0E57316F6B041385C50CBA0AB6DAFE97" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_21D4A1D18A1713FE2C35BA0AB6DBE4CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_2324ECDCB077814EC06DBA0AB6DBD5D0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_21D4A1D18A1713FE2C35BA0AB6DBE4CA" xlink:to="loc_us-gaap_SegmentDomain_2324ECDCB077814EC06DBA0AB6DBD5D0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_2324ECDCB077814EC06DBA0AB6DBD5D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_21D4A1D18A1713FE2C35BA0AB6DBE4CA" xlink:to="loc_us-gaap_SegmentDomain_2324ECDCB077814EC06DBA0AB6DBD5D0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_071E6775B1F7ADC247E2BA0AB6DBB3CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2324ECDCB077814EC06DBA0AB6DBD5D0" xlink:to="loc_ghc_EducationMember_071E6775B1F7ADC247E2BA0AB6DBB3CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_90B07136543735FD81E4BA0AB6DB19E9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_0E57316F6B041385C50CBA0AB6DAFE97" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_90B07136543735FD81E4BA0AB6DB19E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_FD8E76C898918C681121BA0AB6E037FB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_90B07136543735FD81E4BA0AB6DB19E9" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_FD8E76C898918C681121BA0AB6E037FB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_FD8E76C898918C681121BA0AB6E037FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_90B07136543735FD81E4BA0AB6DB19E9" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_FD8E76C898918C681121BA0AB6E037FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_D4894A6995D75F5305BEBA0AB6E05A3E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_0E57316F6B041385C50CBA0AB6DAFE97" xlink:to="loc_us-gaap_StatementClassOfStockAxis_D4894A6995D75F5305BEBA0AB6E05A3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_B4297E6C1B65C553E473BA0AB6E0CE0E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_D4894A6995D75F5305BEBA0AB6E05A3E" xlink:to="loc_us-gaap_ClassOfStockDomain_B4297E6C1B65C553E473BA0AB6E0CE0E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_B4297E6C1B65C553E473BA0AB6E0CE0E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_D4894A6995D75F5305BEBA0AB6E05A3E" xlink:to="loc_us-gaap_ClassOfStockDomain_B4297E6C1B65C553E473BA0AB6E0CE0E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_0F925D04700815FF6840BA0AB6E1E5F6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_B4297E6C1B65C553E473BA0AB6E0CE0E" xlink:to="loc_us-gaap_CommonClassBMember_0F925D04700815FF6840BA0AB6E1E5F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_7AC0DBD0C799B6E4529CBA0AB6E18062" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_B4297E6C1B65C553E473BA0AB6E0CE0E" xlink:to="loc_us-gaap_CommonClassAMember_7AC0DBD0C799B6E4529CBA0AB6E18062" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionAxis" xlink:label="loc_ghc_TransactionAxis_F8F7AA0D57D00DDE012BBA0AB6E1FC48" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_0E57316F6B041385C50CBA0AB6DAFE97" xlink:to="loc_ghc_TransactionAxis_F8F7AA0D57D00DDE012BBA0AB6E1FC48" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_17A37AA1FE24321578A2BA0AB6E11802_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TransactionAxis_F8F7AA0D57D00DDE012BBA0AB6E1FC48" xlink:to="loc_ghc_TransactionTypeDomain_17A37AA1FE24321578A2BA0AB6E11802_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_17A37AA1FE24321578A2BA0AB6E11802" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TransactionAxis_F8F7AA0D57D00DDE012BBA0AB6E1FC48" xlink:to="loc_ghc_TransactionTypeDomain_17A37AA1FE24321578A2BA0AB6E11802" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ResidentialAndMichiganHospitalJointVentureMember" xlink:label="loc_ghc_ResidentialAndMichiganHospitalJointVentureMember_448D5E3E851361FB4813BA0AB6E1864E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_17A37AA1FE24321578A2BA0AB6E11802" xlink:to="loc_ghc_ResidentialAndMichiganHospitalJointVentureMember_448D5E3E851361FB4813BA0AB6E1864E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember" xlink:label="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_311DA8E7060A8526AD37BA0AB6E10871" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_17A37AA1FE24321578A2BA0AB6E11802" xlink:to="loc_ghc_CelticHealthcareAlleghenyHealthNetworkJointVentureMember_311DA8E7060A8526AD37BA0AB6E10871" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BerkshireExchangeTransactionMember" xlink:label="loc_ghc_BerkshireExchangeTransactionMember_13DFCC7AFAD5063B4A9DBA0AB6E12B22" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_17A37AA1FE24321578A2BA0AB6E11802" xlink:to="loc_ghc_BerkshireExchangeTransactionMember_13DFCC7AFAD5063B4A9DBA0AB6E12B22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment" xlink:label="loc_us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment_01A5876BA3B17020328BBA0AB6E1445F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment_01A5876BA3B17020328BBA0AB6E1445F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_3D86D2B2360420BDE0CFBA0AB6E17BBE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_3D86D2B2360420BDE0CFBA0AB6E17BBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_C02BEFA1C8FBCE09B4AFBA0AB6E18501" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_C02BEFA1C8FBCE09B4AFBA0AB6E18501" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeconsolidationGainOrLossAmount" xlink:label="loc_us-gaap_DeconsolidationGainOrLossAmount_04FC8CF005814EF57633BA0AB6E1FFBD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_us-gaap_DeconsolidationGainOrLossAmount_04FC8CF005814EF57633BA0AB6E1FFBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_C44F702C94D51A75295BBA0AB6E1D7AA" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_C44F702C94D51A75295BBA0AB6E1D7AA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfBusinessesDisposed" xlink:label="loc_ghc_NumberOfBusinessesDisposed_D1111CDD01DF34B48843BA0AB6E156AC" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_ghc_NumberOfBusinessesDisposed_D1111CDD01DF34B48843BA0AB6E156AC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ImmaterialErrorCorrectionAmount" xlink:label="loc_ghc_ImmaterialErrorCorrectionAmount_7224D70FACAC0025AD33BA0AB6E11603" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_ghc_ImmaterialErrorCorrectionAmount_7224D70FACAC0025AD33BA0AB6E11603" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ProceedsFromSaleOfEquityMethodInvestmentsIncludingEscrow" xlink:label="loc_ghc_ProceedsFromSaleOfEquityMethodInvestmentsIncludingEscrow_4940EE618F81A8E0AFF9BA0AB6E126F3" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_ghc_ProceedsFromSaleOfEquityMethodInvestmentsIncludingEscrow_4940EE618F81A8E0AFF9BA0AB6E126F3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AmountOfEquityMethodInvestmentSaleCashProceedsHeldInEscrow" xlink:label="loc_ghc_AmountOfEquityMethodInvestmentSaleCashProceedsHeldInEscrow_AC98AD0FB329A8509EA2BA0AB6E24D3B" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_ghc_AmountOfEquityMethodInvestmentSaleCashProceedsHeldInEscrow_AC98AD0FB329A8509EA2BA0AB6E24D3B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfEquityMethodInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_48D0EB38612E3B9889C7BA0AB6E2A2E7" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_48D0EB38612E3B9889C7BA0AB6E2A2E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal" xlink:label="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_3B714E5B119FEFDF4FDDBA0AB6E23688" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_3B714E5B119FEFDF4FDDBA0AB6E23688" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberofSharesExchanged" xlink:label="loc_ghc_NumberofSharesExchanged_73371BF9401D571AF512BA0AB6E248FE" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_ghc_NumberofSharesExchanged_73371BF9401D571AF512BA0AB6E248FE" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GainonShareExchange" xlink:label="loc_ghc_GainonShareExchange_75127B79A4F8DDDAC8C8BA0AB6E2B10F" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_ghc_GainonShareExchange_75127B79A4F8DDDAC8C8BA0AB6E2B10F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_AD24A57E9940DE0AA061BA0AB6E24EBD" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_AD24A57E9940DE0AA061BA0AB6E24EBD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GainLossOnSaleofBuilding" xlink:label="loc_ghc_GainLossOnSaleofBuilding_82F78C333E3855DB7A33BA0AB6E23C8D" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4F36E4A1A28282916564BA0AB6E182A7" xlink:to="loc_ghc_GainLossOnSaleofBuilding_82F78C333E3855DB7A33BA0AB6E23C8D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/OtherNonOperatingExpenseIncomeTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/OtherNonOperatingIncomeExpenseDetails1" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ScheduleofNonOperatingIncomeExpenseLineItems" xlink:label="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ScheduleofNonOperatingIncomeExpenseTable" xlink:label="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_E9CCBE12A986FA61F3C9BA0AB6AD1F3A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_E9CCBE12A986FA61F3C9BA0AB6AD1F3A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_0C30D33F769E47FF4497BA0AB6AD6600" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseTable_E9CCBE12A986FA61F3C9BA0AB6AD1F3A" xlink:to="loc_dei_LegalEntityAxis_0C30D33F769E47FF4497BA0AB6AD6600" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_D62C79F883DB8742F884BA0AB6ADEDE3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_0C30D33F769E47FF4497BA0AB6AD6600" xlink:to="loc_dei_EntityDomain_D62C79F883DB8742F884BA0AB6ADEDE3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_D62C79F883DB8742F884BA0AB6ADEDE3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_0C30D33F769E47FF4497BA0AB6AD6600" xlink:to="loc_dei_EntityDomain_D62C79F883DB8742F884BA0AB6ADEDE3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ClassifiedVenturesLlcMember" xlink:label="loc_ghc_ClassifiedVenturesLlcMember_4FA7C4CE514A03476C63BA0AB6AD8AF0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_D62C79F883DB8742F884BA0AB6ADEDE3" xlink:to="loc_ghc_ClassifiedVenturesLlcMember_4FA7C4CE514A03476C63BA0AB6AD8AF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_8FFF551A187841E39093BA0AB6AD4A2B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_8FFF551A187841E39093BA0AB6AD4A2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_B4CCE652AB36F193819BBA0AB6B019D4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_B4CCE652AB36F193819BBA0AB6B019D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostMethodInvestmentsRealizedGainLoss" xlink:label="loc_us-gaap_CostMethodInvestmentsRealizedGainLoss_E0150FD3FC7B7811C4E5BA0AB6B0DEC1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_us-gaap_CostMethodInvestmentsRealizedGainLoss_E0150FD3FC7B7811C4E5BA0AB6B0DEC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_8FF55BB22A3180426E6CBA0AB6B03849" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_8FF55BB22A3180426E6CBA0AB6B03849" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeconsolidationGainOrLossAmount" xlink:label="loc_us-gaap_DeconsolidationGainOrLossAmount_EFC90289CFD1514B77C7BA0AB6B560A5" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_us-gaap_DeconsolidationGainOrLossAmount_EFC90289CFD1514B77C7BA0AB6B560A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal" xlink:label="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_3DC9F6904FBF3F9CEED5BA0AB6B5B97B" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_3DC9F6904FBF3F9CEED5BA0AB6B5B97B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MarketableSecuritiesRealizedGainLoss" xlink:label="loc_us-gaap_MarketableSecuritiesRealizedGainLoss_96318E888E7B81467CF4BA0AB6B58AE0" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_us-gaap_MarketableSecuritiesRealizedGainLoss_96318E888E7B81467CF4BA0AB6B58AE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingGainsLosses" xlink:label="loc_us-gaap_OtherNonoperatingGainsLosses_308669AF61527D319BF9BA0AB6B53CE4" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_us-gaap_OtherNonoperatingGainsLosses_308669AF61527D319BF9BA0AB6B53CE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_EE2387BF6EB8173878D6BA0AB6B532BC" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_ScheduleofNonOperatingIncomeExpenseLineItems_4D4C41B92C3227377B5BBA0AB6AD6F2B" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_EE2387BF6EB8173878D6BA0AB6B532BC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlans" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansAccumulatedOtherComprehensiveIncomeDetails7" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_39428149F3D3EC621AEDBA0AB751231A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D1764F7EB185B49DE9F7BA0AB75013FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_39428149F3D3EC621AEDBA0AB751231A" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D1764F7EB185B49DE9F7BA0AB75013FB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_04796E516FAF62025725BA0AB750CD4A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D1764F7EB185B49DE9F7BA0AB75013FB" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_04796E516FAF62025725BA0AB750CD4A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_E26A01C6903375A2DB09BA0AB7515008_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_04796E516FAF62025725BA0AB750CD4A" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_E26A01C6903375A2DB09BA0AB7515008_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_E26A01C6903375A2DB09BA0AB7515008" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_04796E516FAF62025725BA0AB750CD4A" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_E26A01C6903375A2DB09BA0AB7515008" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_66C375988C20A16B041EBA0AB751DFA9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_E26A01C6903375A2DB09BA0AB7515008" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_66C375988C20A16B041EBA0AB751DFA9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_28335FD5197B69A4F47BBA0AB7510E5B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_E26A01C6903375A2DB09BA0AB7515008" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_28335FD5197B69A4F47BBA0AB7510E5B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_72F61E7207AA6B0661ACBA0AB751AB07" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_E26A01C6903375A2DB09BA0AB7515008" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_72F61E7207AA6B0661ACBA0AB751AB07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_7B58BF1F185E58DF310ABA0AB751CEB6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_39428149F3D3EC621AEDBA0AB751231A" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_7B58BF1F185E58DF310ABA0AB751CEB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_F1518CD9CFDD82989712BA0AB751D8A4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_39428149F3D3EC621AEDBA0AB751231A" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_F1518CD9CFDD82989712BA0AB751D8A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_DF5E03E7A745162C1E41BA0AB751A23F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_39428149F3D3EC621AEDBA0AB751231A" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_DF5E03E7A745162C1E41BA0AB751A23F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeTax" xlink:label="loc_ghc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeTax_609FFF3170CD472AE9E3BA0AB751FAEC" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_39428149F3D3EC621AEDBA0AB751231A" xlink:to="loc_ghc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeTax_609FFF3170CD472AE9E3BA0AB751FAEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_F529B40DCB642E913D4FBA0AB75100C1" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_39428149F3D3EC621AEDBA0AB751231A" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_F529B40DCB642E913D4FBA0AB75100C1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansAssetAllocationDetails9" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_84B06E5188ADCDA3DD84BA0AB743A39C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_6E30BCD64A8F2AA21712BA0AB73C7542" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_84B06E5188ADCDA3DD84BA0AB743A39C" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_6E30BCD64A8F2AA21712BA0AB73C7542" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_02D794C2593BF222CAA8BA0AB7413D39" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_6E30BCD64A8F2AA21712BA0AB73C7542" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_02D794C2593BF222CAA8BA0AB7413D39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_B882AA040DA44E7A2A61BA0AB7418BBC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_02D794C2593BF222CAA8BA0AB7413D39" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_B882AA040DA44E7A2A61BA0AB7418BBC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_B882AA040DA44E7A2A61BA0AB7418BBC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_02D794C2593BF222CAA8BA0AB7413D39" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_B882AA040DA44E7A2A61BA0AB7418BBC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FixedIncomeSecuritiesMember" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_D72476DE34F498205B55BA0AB7425C4A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_B882AA040DA44E7A2A61BA0AB7418BBC" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_D72476DE34F498205B55BA0AB7425C4A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_DD8678CC8ECB89011629BA0AB742DDBE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_B882AA040DA44E7A2A61BA0AB7418BBC" xlink:to="loc_us-gaap_EquitySecuritiesMember_DD8678CC8ECB89011629BA0AB742DDBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityFundsMember" xlink:label="loc_us-gaap_EquityFundsMember_40D354FB0C95AC1123A4BA0AB742F86F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_B882AA040DA44E7A2A61BA0AB7418BBC" xlink:to="loc_us-gaap_EquityFundsMember_40D354FB0C95AC1123A4BA0AB742F86F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_E82FBCD1D4B5E9820377BA0AB74295A2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_6E30BCD64A8F2AA21712BA0AB73C7542" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_E82FBCD1D4B5E9820377BA0AB74295A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_C7641B9A23BDDE0135EEBA0AB742D982_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_E82FBCD1D4B5E9820377BA0AB74295A2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_C7641B9A23BDDE0135EEBA0AB742D982_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_C7641B9A23BDDE0135EEBA0AB742D982" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_E82FBCD1D4B5E9820377BA0AB74295A2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_C7641B9A23BDDE0135EEBA0AB742D982" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_EDD080024F46D0DE4150BA0AB742E81E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_C7641B9A23BDDE0135EEBA0AB742D982" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_EDD080024F46D0DE4150BA0AB742E81E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_2A36038D924CB93EB4B7BA0AB742D9DD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_6E30BCD64A8F2AA21712BA0AB73C7542" xlink:to="loc_us-gaap_StatementGeographicalAxis_2A36038D924CB93EB4B7BA0AB742D9DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_1C75A4805713B15FC21EBA0AB7424748_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_2A36038D924CB93EB4B7BA0AB742D9DD" xlink:to="loc_us-gaap_SegmentGeographicalDomain_1C75A4805713B15FC21EBA0AB7424748_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_1C75A4805713B15FC21EBA0AB7424748" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_2A36038D924CB93EB4B7BA0AB742D9DD" xlink:to="loc_us-gaap_SegmentGeographicalDomain_1C75A4805713B15FC21EBA0AB7424748" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_A6E2699651639DBFB79EBA0AB74279C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_1C75A4805713B15FC21EBA0AB7424748" xlink:to="loc_country_US_A6E2699651639DBFB79EBA0AB74279C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NonUsMember" xlink:label="loc_us-gaap_NonUsMember_FB7FB29DF3929C0B2533BA0AB743E77F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_1C75A4805713B15FC21EBA0AB7424748" xlink:to="loc_us-gaap_NonUsMember_FB7FB29DF3929C0B2533BA0AB743E77F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_8A1EC9A13F37D471D6A5BA0AB7433ECD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_84B06E5188ADCDA3DD84BA0AB743A39C" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_8A1EC9A13F37D471D6A5BA0AB7433ECD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansAssumedHealthCareCostTrendRatesDetails12" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_789D88E56D338A5A15D2BA0AB6FF8036" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_6FA8B50DA1F143098D81BA0AB6FF6DA1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_789D88E56D338A5A15D2BA0AB6FF8036" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_6FA8B50DA1F143098D81BA0AB6FF6DA1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_EDCCF29049E063EAD96CBA0AB6FF2F34" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_6FA8B50DA1F143098D81BA0AB6FF6DA1" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_EDCCF29049E063EAD96CBA0AB6FF2F34" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_F1499596FED06BD31333BA0AB6FF9109_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_EDCCF29049E063EAD96CBA0AB6FF2F34" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_F1499596FED06BD31333BA0AB6FF9109_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_F1499596FED06BD31333BA0AB6FF9109" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_EDCCF29049E063EAD96CBA0AB6FF2F34" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_F1499596FED06BD31333BA0AB6FF9109" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_9C2E90674493973E5DC3BA0AB6FF34F9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_F1499596FED06BD31333BA0AB6FF9109" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_9C2E90674493973E5DC3BA0AB6FF34F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation_6BC8C98ACE3A7B8371C3BA0AB6FF3F08" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_789D88E56D338A5A15D2BA0AB6FF8036" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation_6BC8C98ACE3A7B8371C3BA0AB6FF3F08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1_FA6028D0A0A138147EB2BA0AB700B83D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_789D88E56D338A5A15D2BA0AB6FF8036" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1_FA6028D0A0A138147EB2BA0AB700B83D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_A83E0F6A94C6CD8FA315BA0AB7007F71" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_789D88E56D338A5A15D2BA0AB6FF8036" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_A83E0F6A94C6CD8FA315BA0AB7007F71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1_7C0A2552E293B09E6C4FBA0AB700EE78" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_789D88E56D338A5A15D2BA0AB6FF8036" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1_7C0A2552E293B09E6C4FBA0AB700EE78" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansConsolidatedBalanceSheetDetails2" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FD17AE65828B851B876FBA0AB770D16C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_F8DE489E76C9F2CF641EBA0AB770E460" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FD17AE65828B851B876FBA0AB770D16C" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_F8DE489E76C9F2CF641EBA0AB770E460" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_EDBB81B9C5A557F6D48DBA0AB7700ACE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_F8DE489E76C9F2CF641EBA0AB770E460" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_EDBB81B9C5A557F6D48DBA0AB7700ACE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_C2B46AF08F8084C58936BA0AB770CD60_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_EDBB81B9C5A557F6D48DBA0AB7700ACE" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_C2B46AF08F8084C58936BA0AB770CD60_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_C2B46AF08F8084C58936BA0AB770CD60" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_EDBB81B9C5A557F6D48DBA0AB7700ACE" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_C2B46AF08F8084C58936BA0AB770CD60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_F87B899914D5BB28379FBA0AB770E520" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_C2B46AF08F8084C58936BA0AB770CD60" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_F87B899914D5BB28379FBA0AB770E520" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_27079C793B8D27D4C8F6BA0AB770CEDE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_C2B46AF08F8084C58936BA0AB770CD60" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_27079C793B8D27D4C8F6BA0AB770CEDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_1C4F88227CF76D630D79BA0AB7700A6C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_C2B46AF08F8084C58936BA0AB770CD60" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_1C4F88227CF76D630D79BA0AB7700A6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_7E3F7B2E00AA0AFE1906BA0AB7701D5F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FD17AE65828B851B876FBA0AB770D16C" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_7E3F7B2E00AA0AFE1906BA0AB7701D5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_3230769C8E178A2C9F88BA0AB770DFE5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FD17AE65828B851B876FBA0AB770D16C" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_3230769C8E178A2C9F88BA0AB770DFE5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_1E6708373E71C081A05ABA0AB770D399" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FD17AE65828B851B876FBA0AB770D16C" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_1E6708373E71C081A05ABA0AB770D399" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_F30870AE0FB782C09E61BA0AB7701E43" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FD17AE65828B851B876FBA0AB770D16C" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_F30870AE0FB782C09E61BA0AB7701E43" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansFairValueOfPensionPlanAssetsDetails10" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F6D6D87B01FEC5327693BA0AB72D41F7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E17C5D43EE0BED2F419FBA0AB72B861B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F6D6D87B01FEC5327693BA0AB72D41F7" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E17C5D43EE0BED2F419FBA0AB72B861B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4E5AADB496D27E77D157BA0AB72B9AA3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E17C5D43EE0BED2F419FBA0AB72B861B" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4E5AADB496D27E77D157BA0AB72B9AA3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E6655CE4D26B4E8B6B9BBA0AB72B0122_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4E5AADB496D27E77D157BA0AB72B9AA3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E6655CE4D26B4E8B6B9BBA0AB72B0122_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E6655CE4D26B4E8B6B9BBA0AB72B0122" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4E5AADB496D27E77D157BA0AB72B9AA3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E6655CE4D26B4E8B6B9BBA0AB72B0122" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_CD0EEA4B5FBC28B6B6EFBA0AB72B6731" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E6655CE4D26B4E8B6B9BBA0AB72B0122" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_CD0EEA4B5FBC28B6B6EFBA0AB72B6731" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_D39D5301CF6E9299A214BA0AB72B75A3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E6655CE4D26B4E8B6B9BBA0AB72B0122" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_D39D5301CF6E9299A214BA0AB72B75A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_FB6D30CA3C046D8DF90EBA0AB72BD012" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E6655CE4D26B4E8B6B9BBA0AB72B0122" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_FB6D30CA3C046D8DF90EBA0AB72BD012" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_AE134B09D94E85A3F8F8BA0AB72BE01C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E17C5D43EE0BED2F419FBA0AB72B861B" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_AE134B09D94E85A3F8F8BA0AB72BE01C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_AE134B09D94E85A3F8F8BA0AB72BE01C" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_AE134B09D94E85A3F8F8BA0AB72BE01C" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CashEquivalentsAndOtherShortTermInvestmentsMember" xlink:label="loc_ghc_CashEquivalentsAndOtherShortTermInvestmentsMember_D64A6CF9273849E346B0BA0AB72C8C69" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:to="loc_ghc_CashEquivalentsAndOtherShortTermInvestmentsMember_D64A6CF9273849E346B0BA0AB72C8C69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_6A8627EF0AA39E188E35BA0AB72C1722" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:to="loc_us-gaap_EquitySecuritiesMember_6A8627EF0AA39E188E35BA0AB72C1722" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityFundsMember" xlink:label="loc_us-gaap_EquityFundsMember_B92E48D3CE4E809F3F1DBA0AB72C83F0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:to="loc_us-gaap_EquityFundsMember_B92E48D3CE4E809F3F1DBA0AB72C83F0" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_USFederalAgencyMortgageBackedSecuritiesMember" xlink:label="loc_ghc_USFederalAgencyMortgageBackedSecuritiesMember_DBEA995BED3B287887F6BA0AB72C4A2F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:to="loc_ghc_USFederalAgencyMortgageBackedSecuritiesMember_DBEA995BED3B287887F6BA0AB72C4A2F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_2CACF7E4E3BD661F7B8BBA0AB72C1A1D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_2CACF7E4E3BD661F7B8BBA0AB72C1A1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FixedIncomeSecuritiesMember" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_2640F9F9C887B93EB064BA0AB72C14F3" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_2640F9F9C887B93EB064BA0AB72C14F3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TotalInvestmentsMember" xlink:label="loc_ghc_TotalInvestmentsMember_C8AC5AEBB38C38C5B208BA0AB72CD5F9" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:to="loc_ghc_TotalInvestmentsMember_C8AC5AEBB38C38C5B208BA0AB72CD5F9" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ReceivablesMember" xlink:label="loc_ghc_ReceivablesMember_53A9EB6DB0060875C924BA0AB72C1F3E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C43A7C46E4DE5FFA7390BA0AB72BA704" xlink:to="loc_ghc_ReceivablesMember_53A9EB6DB0060875C924BA0AB72C1F3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_53E23EFFC063A35D5834BA0AB72CF192" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E17C5D43EE0BED2F419FBA0AB72B861B" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_53E23EFFC063A35D5834BA0AB72CF192" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_9C7412959688F4635833BA0AB72CAD54_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_53E23EFFC063A35D5834BA0AB72CF192" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_9C7412959688F4635833BA0AB72CAD54_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_9C7412959688F4635833BA0AB72CAD54" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_53E23EFFC063A35D5834BA0AB72CF192" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_9C7412959688F4635833BA0AB72CAD54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_19257FB6D16783142BD4BA0AB72C2781" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_9C7412959688F4635833BA0AB72CAD54" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_19257FB6D16783142BD4BA0AB72C2781" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_D29D6559099E8E7389F4BA0AB72C849D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E17C5D43EE0BED2F419FBA0AB72B861B" xlink:to="loc_us-gaap_StatementGeographicalAxis_D29D6559099E8E7389F4BA0AB72C849D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_302C9528400965419019BA0AB72C86A8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_D29D6559099E8E7389F4BA0AB72C849D" xlink:to="loc_us-gaap_SegmentGeographicalDomain_302C9528400965419019BA0AB72C86A8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_302C9528400965419019BA0AB72C86A8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_D29D6559099E8E7389F4BA0AB72C849D" xlink:to="loc_us-gaap_SegmentGeographicalDomain_302C9528400965419019BA0AB72C86A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_AFB1FE83039DC6BC2F1DBA0AB72CB9E8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_302C9528400965419019BA0AB72C86A8" xlink:to="loc_country_US_AFB1FE83039DC6BC2F1DBA0AB72CB9E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NonUsMember" xlink:label="loc_us-gaap_NonUsMember_37242467A2E9DDEC8E0DBA0AB72CB8AB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_302C9528400965419019BA0AB72C86A8" xlink:to="loc_us-gaap_NonUsMember_37242467A2E9DDEC8E0DBA0AB72CB8AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_825A202AAD50C0C8329ABA0AB72C0496" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E17C5D43EE0BED2F419FBA0AB72B861B" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_825A202AAD50C0C8329ABA0AB72C0496" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_47F31987E2D575D3AA10BA0AB72CE4AA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_825A202AAD50C0C8329ABA0AB72C0496" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_47F31987E2D575D3AA10BA0AB72CE4AA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_47F31987E2D575D3AA10BA0AB72CE4AA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_825A202AAD50C0C8329ABA0AB72C0496" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_47F31987E2D575D3AA10BA0AB72CE4AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_39A08C3A07805D1B67F9BA0AB72DEA96" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_47F31987E2D575D3AA10BA0AB72CE4AA" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_39A08C3A07805D1B67F9BA0AB72DEA96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_5313B1FF988179DFC1A0BA0AB72D5714" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F6D6D87B01FEC5327693BA0AB72D41F7" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_5313B1FF988179DFC1A0BA0AB72D5714" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansFutureAmortizationOfNetPeriodicCostDetails8" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E274A382E9283FF7448EBA0AB74C7134" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_BFA248A8E0D271681974BA0AB74CB431" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E274A382E9283FF7448EBA0AB74C7134" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_BFA248A8E0D271681974BA0AB74CB431" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_54BFC91CC2F1EC01CA45BA0AB74C8902" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_BFA248A8E0D271681974BA0AB74CB431" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_54BFC91CC2F1EC01CA45BA0AB74C8902" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6E7B2017049C3C4325D1BA0AB74CCEAC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_54BFC91CC2F1EC01CA45BA0AB74C8902" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6E7B2017049C3C4325D1BA0AB74CCEAC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6E7B2017049C3C4325D1BA0AB74CCEAC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_54BFC91CC2F1EC01CA45BA0AB74C8902" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6E7B2017049C3C4325D1BA0AB74CCEAC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_B47E6E0BC5955433F84EBA0AB74CA568" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6E7B2017049C3C4325D1BA0AB74CCEAC" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_B47E6E0BC5955433F84EBA0AB74CA568" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_C3EDD3D4137A00EACB0ABA0AB74C3EF6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6E7B2017049C3C4325D1BA0AB74CCEAC" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_C3EDD3D4137A00EACB0ABA0AB74C3EF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_71539ECB72761F22F65FBA0AB74CBA6C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6E7B2017049C3C4325D1BA0AB74CCEAC" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_71539ECB72761F22F65FBA0AB74CBA6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_2BA230FAC4A8BF3B7371BA0AB74C8D7F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E274A382E9283FF7448EBA0AB74C7134" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_2BA230FAC4A8BF3B7371BA0AB74C8D7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear_4246D718DBAC78818A58BA0AB74CEDDE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E274A382E9283FF7448EBA0AB74C7134" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear_4246D718DBAC78818A58BA0AB74CEDDE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansFutureEstimatedBenefitPaymentsDetails4" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_CD39D80085D50A7B3E16BA0AB764C9E9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1BF3462BADDB8F433E73BA0AB7638753" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_CD39D80085D50A7B3E16BA0AB764C9E9" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1BF3462BADDB8F433E73BA0AB7638753" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_B7BD2719EC7DC80E1720BA0AB763324E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1BF3462BADDB8F433E73BA0AB7638753" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_B7BD2719EC7DC80E1720BA0AB763324E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5B55F040972CFEC4D5D7BA0AB7644BC6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B7BD2719EC7DC80E1720BA0AB763324E" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5B55F040972CFEC4D5D7BA0AB7644BC6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5B55F040972CFEC4D5D7BA0AB7644BC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B7BD2719EC7DC80E1720BA0AB763324E" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5B55F040972CFEC4D5D7BA0AB7644BC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_132EFAD99C9AC004A167BA0AB7642D8F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5B55F040972CFEC4D5D7BA0AB7644BC6" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_132EFAD99C9AC004A167BA0AB7642D8F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_AF2DD73E0BE5F9691B6DBA0AB7642AC5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5B55F040972CFEC4D5D7BA0AB7644BC6" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_AF2DD73E0BE5F9691B6DBA0AB7642AC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_2C8B18A462CE2484E2F4BA0AB764C103" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5B55F040972CFEC4D5D7BA0AB7644BC6" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_2C8B18A462CE2484E2F4BA0AB764C103" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_17B201733747A9039737BA0AB764FECB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_CD39D80085D50A7B3E16BA0AB764C9E9" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_17B201733747A9039737BA0AB764FECB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_A3D7A4880ADA70717318BA0AB764898F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_CD39D80085D50A7B3E16BA0AB764C9E9" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_A3D7A4880ADA70717318BA0AB764898F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_2B2AE08CDA8B535D2785BA0AB7643539" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_CD39D80085D50A7B3E16BA0AB764C9E9" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_2B2AE08CDA8B535D2785BA0AB7643539" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_9563327AAB13B602A5F9BA0AB7643A2A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_CD39D80085D50A7B3E16BA0AB764C9E9" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_9563327AAB13B602A5F9BA0AB7643A2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_8AE0EF6BFDFA5E86F66DBA0AB764923D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_CD39D80085D50A7B3E16BA0AB764C9E9" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_8AE0EF6BFDFA5E86F66DBA0AB764923D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_1E0FFE5C11CCE6BC4D2EBA0AB7647D0C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_CD39D80085D50A7B3E16BA0AB764C9E9" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_1E0FFE5C11CCE6BC4D2EBA0AB7647D0C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansKeyAssumptionsCostDetails6" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E1ED21F05881B968F7F6BA0AB7572E63" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E94A7DEA2B1A73ECDAE1BA0AB756EBA5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E1ED21F05881B968F7F6BA0AB7572E63" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E94A7DEA2B1A73ECDAE1BA0AB756EBA5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MultiemployerPlanTypeAxis" xlink:label="loc_us-gaap_MultiemployerPlanTypeAxis_ED50D76BD92ACFFD91F2BA0AB756BB5A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E94A7DEA2B1A73ECDAE1BA0AB756EBA5" xlink:to="loc_us-gaap_MultiemployerPlanTypeAxis_ED50D76BD92ACFFD91F2BA0AB756BB5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MultiemployerPlansTypeDomain" xlink:label="loc_us-gaap_MultiemployerPlansTypeDomain_3F416D0B5E7ED5D6F0FEBA0AB7569A58_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MultiemployerPlanTypeAxis_ED50D76BD92ACFFD91F2BA0AB756BB5A" xlink:to="loc_us-gaap_MultiemployerPlansTypeDomain_3F416D0B5E7ED5D6F0FEBA0AB7569A58_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MultiemployerPlansTypeDomain" xlink:label="loc_us-gaap_MultiemployerPlansTypeDomain_3F416D0B5E7ED5D6F0FEBA0AB7569A58" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MultiemployerPlanTypeAxis_ED50D76BD92ACFFD91F2BA0AB756BB5A" xlink:to="loc_us-gaap_MultiemployerPlansTypeDomain_3F416D0B5E7ED5D6F0FEBA0AB7569A58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_F78F8CC924FDBDAC1A0DBA0AB7565493" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E94A7DEA2B1A73ECDAE1BA0AB756EBA5" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_F78F8CC924FDBDAC1A0DBA0AB7565493" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1B17C52F1B2A7D104299BA0AB756B349_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F78F8CC924FDBDAC1A0DBA0AB7565493" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1B17C52F1B2A7D104299BA0AB756B349_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1B17C52F1B2A7D104299BA0AB756B349" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F78F8CC924FDBDAC1A0DBA0AB7565493" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1B17C52F1B2A7D104299BA0AB756B349" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_CE35E65350C48EEC6007BA0AB7578A97" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_1B17C52F1B2A7D104299BA0AB756B349" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_CE35E65350C48EEC6007BA0AB7578A97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_2304D713D3798E0F4A16BA0AB7579320" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_1B17C52F1B2A7D104299BA0AB756B349" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_2304D713D3798E0F4A16BA0AB7579320" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis" xlink:label="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_9B4142FFC8120741E80DBA0AB757090E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E94A7DEA2B1A73ECDAE1BA0AB756EBA5" xlink:to="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_9B4142FFC8120741E80DBA0AB757090E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain" xlink:label="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_3EA0D93EC42EFF72B9ABBA0AB75799C3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_9B4142FFC8120741E80DBA0AB757090E" xlink:to="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_3EA0D93EC42EFF72B9ABBA0AB75799C3_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain" xlink:label="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_3EA0D93EC42EFF72B9ABBA0AB75799C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_9B4142FFC8120741E80DBA0AB757090E" xlink:to="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_3EA0D93EC42EFF72B9ABBA0AB75799C3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PeriodicCostMember" xlink:label="loc_ghc_PeriodicCostMember_E45EC803210B1F62FE89BA0AB7571E29" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_3EA0D93EC42EFF72B9ABBA0AB75799C3" xlink:to="loc_ghc_PeriodicCostMember_E45EC803210B1F62FE89BA0AB7571E29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_19782DA9F269D2629681BA0AB75741B1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E94A7DEA2B1A73ECDAE1BA0AB756EBA5" xlink:to="loc_us-gaap_RangeAxis_19782DA9F269D2629681BA0AB75741B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_C47E032326D673C5F6A3BA0AB7571C87_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_19782DA9F269D2629681BA0AB75741B1" xlink:to="loc_us-gaap_RangeMember_C47E032326D673C5F6A3BA0AB7571C87_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_C47E032326D673C5F6A3BA0AB7571C87" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_19782DA9F269D2629681BA0AB75741B1" xlink:to="loc_us-gaap_RangeMember_C47E032326D673C5F6A3BA0AB7571C87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_0F0541C64D236597096FBA0AB757B1C2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_C47E032326D673C5F6A3BA0AB7571C87" xlink:to="loc_us-gaap_MinimumMember_0F0541C64D236597096FBA0AB757B1C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_E4C08DACEF2EB8E8A4E6BA0AB7571225" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_C47E032326D673C5F6A3BA0AB7571C87" xlink:to="loc_us-gaap_MaximumMember_E4C08DACEF2EB8E8A4E6BA0AB7571225" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_687463BAACE01CE27215BA0AB757097A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E1ED21F05881B968F7F6BA0AB7572E63" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_687463BAACE01CE27215BA0AB757097A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_EF9FAB3C0B8D9039F6C2BA0AB757C954" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E1ED21F05881B968F7F6BA0AB7572E63" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_EF9FAB3C0B8D9039F6C2BA0AB757C954" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_B15942AA555A3C31A7A9BA0AB75703AA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E1ED21F05881B968F7F6BA0AB7572E63" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_B15942AA555A3C31A7A9BA0AB75703AA" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansKeyAssumptionsObligationDetails3" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_3CD047D2DFDA8CB8A235BA0AB76AEB06" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_694288F05449A9EE27ADBA0AB769A2C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_3CD047D2DFDA8CB8A235BA0AB76AEB06" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_694288F05449A9EE27ADBA0AB769A2C3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_1814A740BE6DCDD29F6CBA0AB76933C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_694288F05449A9EE27ADBA0AB769A2C3" xlink:to="loc_us-gaap_RangeAxis_1814A740BE6DCDD29F6CBA0AB76933C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_60AFC10B0E70B7AFD32BBA0AB7697CF7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_1814A740BE6DCDD29F6CBA0AB76933C1" xlink:to="loc_us-gaap_RangeMember_60AFC10B0E70B7AFD32BBA0AB7697CF7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_60AFC10B0E70B7AFD32BBA0AB7697CF7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_1814A740BE6DCDD29F6CBA0AB76933C1" xlink:to="loc_us-gaap_RangeMember_60AFC10B0E70B7AFD32BBA0AB7697CF7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_5D9AA89F3B2BF6C6CFE3BA0AB76929B1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_60AFC10B0E70B7AFD32BBA0AB7697CF7" xlink:to="loc_us-gaap_MaximumMember_5D9AA89F3B2BF6C6CFE3BA0AB76929B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_531CC1D890292CC3AD34BA0AB769A75A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_60AFC10B0E70B7AFD32BBA0AB7697CF7" xlink:to="loc_us-gaap_MinimumMember_531CC1D890292CC3AD34BA0AB769A75A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_E6C6321D8D561233109FBA0AB7696FD6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_694288F05449A9EE27ADBA0AB769A2C3" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_E6C6321D8D561233109FBA0AB7696FD6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_9A24B51F522B4BBE91BBBA0AB7692494_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_E6C6321D8D561233109FBA0AB7696FD6" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_9A24B51F522B4BBE91BBBA0AB7692494_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_9A24B51F522B4BBE91BBBA0AB7692494" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_E6C6321D8D561233109FBA0AB7696FD6" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_9A24B51F522B4BBE91BBBA0AB7692494" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_4FD3F0DF8A33AB253406BA0AB769AFF8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_9A24B51F522B4BBE91BBBA0AB7692494" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_4FD3F0DF8A33AB253406BA0AB769AFF8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_5DE2D233E774E75C7937BA0AB76AC54F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_9A24B51F522B4BBE91BBBA0AB7692494" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_5DE2D233E774E75C7937BA0AB76AC54F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis" xlink:label="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_687961CF3FB3D380E79ABA0AB76AB771" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_694288F05449A9EE27ADBA0AB769A2C3" xlink:to="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_687961CF3FB3D380E79ABA0AB76AB771" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain" xlink:label="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_87BE8EFA0F5F9A71D7D4BA0AB76A8D9A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_687961CF3FB3D380E79ABA0AB76AB771" xlink:to="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_87BE8EFA0F5F9A71D7D4BA0AB76A8D9A_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain" xlink:label="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_87BE8EFA0F5F9A71D7D4BA0AB76A8D9A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_687961CF3FB3D380E79ABA0AB76AB771" xlink:to="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_87BE8EFA0F5F9A71D7D4BA0AB76A8D9A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BenefitObligationMember" xlink:label="loc_ghc_BenefitObligationMember_6965D2A82A0DE51EFC81BA0AB76ABD06" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_87BE8EFA0F5F9A71D7D4BA0AB76A8D9A" xlink:to="loc_ghc_BenefitObligationMember_6965D2A82A0DE51EFC81BA0AB76ABD06" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PeriodicCostMember" xlink:label="loc_ghc_PeriodicCostMember_AAB32A1CDB2260F5631ABA0AB76A200F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_87BE8EFA0F5F9A71D7D4BA0AB76A8D9A" xlink:to="loc_ghc_PeriodicCostMember_AAB32A1CDB2260F5631ABA0AB76A200F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_4FCE98FFC2F1B965B779BA0AB76AFE7D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_3CD047D2DFDA8CB8A235BA0AB76AEB06" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_4FCE98FFC2F1B965B779BA0AB76AFE7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_68B89E59ADDBF7F89285BA0AB76A2601" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_3CD047D2DFDA8CB8A235BA0AB76AEB06" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_68B89E59ADDBF7F89285BA0AB76A2601" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RetirementBenefitsDisclosureLineItems" xlink:label="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_CE7906DFB15261177A5DBA0AB7BAAA28" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_RangeAxis_CE7906DFB15261177A5DBA0AB7BAAA28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_31F94633ABDC77821CD8BA0AB7BA9682_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_CE7906DFB15261177A5DBA0AB7BAAA28" xlink:to="loc_us-gaap_RangeMember_31F94633ABDC77821CD8BA0AB7BA9682_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_31F94633ABDC77821CD8BA0AB7BA9682" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_CE7906DFB15261177A5DBA0AB7BAAA28" xlink:to="loc_us-gaap_RangeMember_31F94633ABDC77821CD8BA0AB7BA9682" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_217CBDA89D7A184F3D64BA0AB7BA2858" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_31F94633ABDC77821CD8BA0AB7BA9682" xlink:to="loc_us-gaap_MaximumMember_217CBDA89D7A184F3D64BA0AB7BA2858" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_63DAC1DDE2425BBE6DEEBA0AB7BA2177" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_31F94633ABDC77821CD8BA0AB7BA9682" xlink:to="loc_us-gaap_MinimumMember_63DAC1DDE2425BBE6DEEBA0AB7BA2177" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionAxis" xlink:label="loc_ghc_TransactionAxis_B2D7335BEF3DCDB1CBF3BA0AB7BB37CD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_ghc_TransactionAxis_B2D7335BEF3DCDB1CBF3BA0AB7BB37CD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_2A01F5700EE87DCDC021BA0AB7BBB8A4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_TransactionAxis_B2D7335BEF3DCDB1CBF3BA0AB7BB37CD" xlink:to="loc_ghc_TransactionTypeDomain_2A01F5700EE87DCDC021BA0AB7BBB8A4_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TransactionTypeDomain" xlink:label="loc_ghc_TransactionTypeDomain_2A01F5700EE87DCDC021BA0AB7BBB8A4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_TransactionAxis_B2D7335BEF3DCDB1CBF3BA0AB7BB37CD" xlink:to="loc_ghc_TransactionTypeDomain_2A01F5700EE87DCDC021BA0AB7BBB8A4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CableSpinOffMember" xlink:label="loc_ghc_CableSpinOffMember_C2F03048A24CAB1980D3BA0AB7BB9AB5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_2A01F5700EE87DCDC021BA0AB7BBB8A4" xlink:to="loc_ghc_CableSpinOffMember_C2F03048A24CAB1980D3BA0AB7BB9AB5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SaleOfKHECampusesBusinessMember" xlink:label="loc_ghc_SaleOfKHECampusesBusinessMember_B78E12BBC7349C1C0738BA0AB7BBF8AF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_TransactionTypeDomain_2A01F5700EE87DCDC021BA0AB7BBB8A4" xlink:to="loc_ghc_SaleOfKHECampusesBusinessMember_B78E12BBC7349C1C0738BA0AB7BBF8AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_FB326545F1E3703CB943BA0AB7BB742E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_FB326545F1E3703CB943BA0AB7BB742E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_7F5EEC74D59F91565DD5BA0AB7BBFBC3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FB326545F1E3703CB943BA0AB7BB742E" xlink:to="loc_us-gaap_SegmentDomain_7F5EEC74D59F91565DD5BA0AB7BBFBC3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_7F5EEC74D59F91565DD5BA0AB7BBFBC3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FB326545F1E3703CB943BA0AB7BB742E" xlink:to="loc_us-gaap_SegmentDomain_7F5EEC74D59F91565DD5BA0AB7BBFBC3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_B8F3BCA5D53ACB49B35BBA0AB7BB3401" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_7F5EEC74D59F91565DD5BA0AB7BBFBC3" xlink:to="loc_ghc_EducationMember_B8F3BCA5D53ACB49B35BBA0AB7BB3401" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarlyRetirmentProgramExpenseAxis" xlink:label="loc_ghc_EarlyRetirmentProgramExpenseAxis_138291171CFAE3DAE5C0BA0AB7BBF8B1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_ghc_EarlyRetirmentProgramExpenseAxis_138291171CFAE3DAE5C0BA0AB7BBF8B1" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarlyRetirementProgramExpenseDomain" xlink:label="loc_ghc_EarlyRetirementProgramExpenseDomain_3AFC87C719645F5FC582BA0AB7BBC6A7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_EarlyRetirmentProgramExpenseAxis_138291171CFAE3DAE5C0BA0AB7BBF8B1" xlink:to="loc_ghc_EarlyRetirementProgramExpenseDomain_3AFC87C719645F5FC582BA0AB7BBC6A7_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarlyRetirementProgramExpenseDomain" xlink:label="loc_ghc_EarlyRetirementProgramExpenseDomain_3AFC87C719645F5FC582BA0AB7BBC6A7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_EarlyRetirmentProgramExpenseAxis_138291171CFAE3DAE5C0BA0AB7BBF8B1" xlink:to="loc_ghc_EarlyRetirementProgramExpenseDomain_3AFC87C719645F5FC582BA0AB7BBC6A7" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SpecialIncentiveProgramMember" xlink:label="loc_ghc_SpecialIncentiveProgramMember_F7B4E33A5E7E67380625BA0AB7BC759F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_EarlyRetirementProgramExpenseDomain_3AFC87C719645F5FC582BA0AB7BBC6A7" xlink:to="loc_ghc_SpecialIncentiveProgramMember_F7B4E33A5E7E67380625BA0AB7BC759F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SeparationIncentiveProgramMember" xlink:label="loc_ghc_SeparationIncentiveProgramMember_7009273F4BF770623689BA0AB7BC07A1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_EarlyRetirementProgramExpenseDomain_3AFC87C719645F5FC582BA0AB7BBC6A7" xlink:to="loc_ghc_SeparationIncentiveProgramMember_7009273F4BF770623689BA0AB7BC07A1" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_VoluntaryRetirementIncentiveProgramMember" xlink:label="loc_ghc_VoluntaryRetirementIncentiveProgramMember_A9C9088E94B51AF8412BBA0AB7BCC574" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_EarlyRetirementProgramExpenseDomain_3AFC87C719645F5FC582BA0AB7BBC6A7" xlink:to="loc_ghc_VoluntaryRetirementIncentiveProgramMember_A9C9088E94B51AF8412BBA0AB7BCC574" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_B81D1A1796C015D87645BA0AB7BC1C0B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_B81D1A1796C015D87645BA0AB7BC1C0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_6F4EDAF67CCA24FBB083BA0AB7BCCA05_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_B81D1A1796C015D87645BA0AB7BC1C0B" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_6F4EDAF67CCA24FBB083BA0AB7BCCA05_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_6F4EDAF67CCA24FBB083BA0AB7BCCA05" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_B81D1A1796C015D87645BA0AB7BC1C0B" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_6F4EDAF67CCA24FBB083BA0AB7BCCA05" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlanAssetsTotalMember" xlink:label="loc_ghc_DefinedBenefitPlanAssetsTotalMember_ABFD0FFFBF90214C8A9FBA0AB7BCBFA5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_6F4EDAF67CCA24FBB083BA0AB7BCCA05" xlink:to="loc_ghc_DefinedBenefitPlanAssetsTotalMember_ABFD0FFFBF90214C8A9FBA0AB7BCBFA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_592129D76A21ED852E0DBA0AB7BC7247" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_592129D76A21ED852E0DBA0AB7BC7247" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_070A2F651813C43BB9CEBA0AB7BCCA80_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_592129D76A21ED852E0DBA0AB7BC7247" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_070A2F651813C43BB9CEBA0AB7BCCA80_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_070A2F651813C43BB9CEBA0AB7BCCA80" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_592129D76A21ED852E0DBA0AB7BC7247" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_070A2F651813C43BB9CEBA0AB7BCCA80" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ConcentrationInSingleEntityTypeOfIndustryForeignCountryOrIndividualFundMember" xlink:label="loc_ghc_ConcentrationInSingleEntityTypeOfIndustryForeignCountryOrIndividualFundMember_9E0A8C7B2FE83D7485AFBA0AB7BC0B88" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_070A2F651813C43BB9CEBA0AB7BCCA80" xlink:to="loc_ghc_ConcentrationInSingleEntityTypeOfIndustryForeignCountryOrIndividualFundMember_9E0A8C7B2FE83D7485AFBA0AB7BC0B88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GeographicConcentrationRiskMember" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember_85CFFA2EC9930651D105BA0AB7BD253D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_070A2F651813C43BB9CEBA0AB7BCCA80" xlink:to="loc_us-gaap_GeographicConcentrationRiskMember_85CFFA2EC9930651D105BA0AB7BD253D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SingleEquityConcentrationMember" xlink:label="loc_ghc_SingleEquityConcentrationMember_41DA4F367137BF11778DBA0AB7BD72A3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_070A2F651813C43BB9CEBA0AB7BCCA80" xlink:to="loc_ghc_SingleEquityConcentrationMember_41DA4F367137BF11778DBA0AB7BD72A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_F33335FD3F32724323B4BA0AB7BDB51F" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_F33335FD3F32724323B4BA0AB7BDB51F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_F33335FD3F32724323B4BA0AB7BDB51F" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_F33335FD3F32724323B4BA0AB7BDB51F" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForeignInvestmentsMember" xlink:label="loc_ghc_ForeignInvestmentsMember_521C76FB3181599F7E0DBA0AB7BDBA14" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5" xlink:to="loc_ghc_ForeignInvestmentsMember_521C76FB3181599F7E0DBA0AB7BDBA14" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SingleEquityConcentrationMember" xlink:label="loc_ghc_SingleEquityConcentrationMember_086B702AEB48311B9F0EBA0AB7BD0DCF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5" xlink:to="loc_ghc_SingleEquityConcentrationMember_086B702AEB48311B9F0EBA0AB7BD0DCF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ConcentrationInSingleEntityTypeOfIndustryForeignCountryOrIndividualFundMember" xlink:label="loc_ghc_ConcentrationInSingleEntityTypeOfIndustryForeignCountryOrIndividualFundMember_F2B2D19CCB12F93A9E52BA0AB7BD9BD2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5" xlink:to="loc_ghc_ConcentrationInSingleEntityTypeOfIndustryForeignCountryOrIndividualFundMember_F2B2D19CCB12F93A9E52BA0AB7BD9BD2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FixedIncomeSecuritiesMember" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_8684F8CC5DB008C7E7F1BA0AB7BD9A51" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_8684F8CC5DB008C7E7F1BA0AB7BD9A51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_02FB14E971C3CFC0DF6EBA0AB7BD4FF0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5" xlink:to="loc_us-gaap_EquitySecuritiesMember_02FB14E971C3CFC0DF6EBA0AB7BD4FF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityFundsMember" xlink:label="loc_us-gaap_EquityFundsMember_E447799976BFDE07891FBA0AB7BD6788" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_F9CFBB4E86247BA0F0B7BA0AB7BD22E5" xlink:to="loc_us-gaap_EquityFundsMember_E447799976BFDE07891FBA0AB7BD6788" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ScheduleOfMarketableSecuritiesEquitySecuritiesInvesteeNameAxis" xlink:label="loc_ghc_ScheduleOfMarketableSecuritiesEquitySecuritiesInvesteeNameAxis_2EE5E5B678AC3468C5B8BA0AB7BDD658" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_ghc_ScheduleOfMarketableSecuritiesEquitySecuritiesInvesteeNameAxis_2EE5E5B678AC3468C5B8BA0AB7BDD658" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_MarketableSecuritiesEquitySecuritiesInvesteeNameDomain" xlink:label="loc_ghc_MarketableSecuritiesEquitySecuritiesInvesteeNameDomain_B5543A9275A35B6C2B0DBA0AB7BD329E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_ScheduleOfMarketableSecuritiesEquitySecuritiesInvesteeNameAxis_2EE5E5B678AC3468C5B8BA0AB7BDD658" xlink:to="loc_ghc_MarketableSecuritiesEquitySecuritiesInvesteeNameDomain_B5543A9275A35B6C2B0DBA0AB7BD329E_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_MarketableSecuritiesEquitySecuritiesInvesteeNameDomain" xlink:label="loc_ghc_MarketableSecuritiesEquitySecuritiesInvesteeNameDomain_B5543A9275A35B6C2B0DBA0AB7BD329E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_ScheduleOfMarketableSecuritiesEquitySecuritiesInvesteeNameAxis_2EE5E5B678AC3468C5B8BA0AB7BDD658" xlink:to="loc_ghc_MarketableSecuritiesEquitySecuritiesInvesteeNameDomain_B5543A9275A35B6C2B0DBA0AB7BD329E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_41F4863BCDE71021B3A3BA0AB7BE9C31" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_StatementClassOfStockAxis_41F4863BCDE71021B3A3BA0AB7BE9C31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1E4C82D2BE77CB44BCF5BA0AB7BECC80_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_41F4863BCDE71021B3A3BA0AB7BE9C31" xlink:to="loc_us-gaap_ClassOfStockDomain_1E4C82D2BE77CB44BCF5BA0AB7BECC80_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1E4C82D2BE77CB44BCF5BA0AB7BECC80" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_41F4863BCDE71021B3A3BA0AB7BE9C31" xlink:to="loc_us-gaap_ClassOfStockDomain_1E4C82D2BE77CB44BCF5BA0AB7BECC80" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BerkshireHathawayCommonStockMember" xlink:label="loc_ghc_BerkshireHathawayCommonStockMember_3602A3B9AC22E2C6CD81BA0AB7BEF232" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1E4C82D2BE77CB44BCF5BA0AB7BECC80" xlink:to="loc_ghc_BerkshireHathawayCommonStockMember_3602A3B9AC22E2C6CD81BA0AB7BEF232" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_FDAF3CFB91708F5DD843BA0AB7BE284C" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_FDAF3CFB91708F5DD843BA0AB7BE284C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_7D4FC7BC386DA07D14F2BA0AB7BE08B9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_FDAF3CFB91708F5DD843BA0AB7BE284C" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_7D4FC7BC386DA07D14F2BA0AB7BE08B9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_7D4FC7BC386DA07D14F2BA0AB7BE08B9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_FDAF3CFB91708F5DD843BA0AB7BE284C" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_7D4FC7BC386DA07D14F2BA0AB7BE08B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_408AE8E3078CDE700C55BA0AB7BE3274" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_7D4FC7BC386DA07D14F2BA0AB7BE08B9" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_408AE8E3078CDE700C55BA0AB7BE3274" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_C1B7D2852050F272E339BA0AB7BEE9C0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_7D4FC7BC386DA07D14F2BA0AB7BE08B9" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_C1B7D2852050F272E339BA0AB7BEE9C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_E30959B9DF1376467482BA0AB7BE659E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_7D4FC7BC386DA07D14F2BA0AB7BE08B9" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_E30959B9DF1376467482BA0AB7BE659E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_86864E98369DD99E084EBA0AB7BED9FD" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_dei_LegalEntityAxis_86864E98369DD99E084EBA0AB7BED9FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_C4C2367C5B4469EF6263BA0AB7BE1844_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_86864E98369DD99E084EBA0AB7BED9FD" xlink:to="loc_dei_EntityDomain_C4C2367C5B4469EF6263BA0AB7BE1844_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_C4C2367C5B4469EF6263BA0AB7BE1844" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_86864E98369DD99E084EBA0AB7BED9FD" xlink:to="loc_dei_EntityDomain_C4C2367C5B4469EF6263BA0AB7BE1844" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForneyMember" xlink:label="loc_ghc_ForneyMember_03366A96AB29E26E9DCEBA0AB7BE37FD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_C4C2367C5B4469EF6263BA0AB7BE1844" xlink:to="loc_ghc_ForneyMember_03366A96AB29E26E9DCEBA0AB7BE37FD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_CorporateOfficeMember" xlink:label="loc_ghc_CorporateOfficeMember_F676663A18BD8CB8E052BA0AB7BE948F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_C4C2367C5B4469EF6263BA0AB7BE1844" xlink:to="loc_ghc_CorporateOfficeMember_F676663A18BD8CB8E052BA0AB7BE948F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlanHealthCareCostTrendGroupsAxis" xlink:label="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsAxis_1D1A37ACF8856A910F92BA0AB7BE4E23" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsAxis_1D1A37ACF8856A910F92BA0AB7BE4E23" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlanHealthCareCostTrendGroupsDomain" xlink:label="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsDomain_863D88B6652C789E254FBA0AB7BE3BCC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsAxis_1D1A37ACF8856A910F92BA0AB7BE4E23" xlink:to="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsDomain_863D88B6652C789E254FBA0AB7BE3BCC_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlanHealthCareCostTrendGroupsDomain" xlink:label="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsDomain_863D88B6652C789E254FBA0AB7BE3BCC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsAxis_1D1A37ACF8856A910F92BA0AB7BE4E23" xlink:to="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsDomain_863D88B6652C789E254FBA0AB7BE3BCC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PreAge65Member" xlink:label="loc_ghc_PreAge65Member_698E4F5655BC9BC2BAF0BA0AB7BE5D1E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsDomain_863D88B6652C789E254FBA0AB7BE3BCC" xlink:to="loc_ghc_PreAge65Member_698E4F5655BC9BC2BAF0BA0AB7BE5D1E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PostAge65Member" xlink:label="loc_ghc_PostAge65Member_F3B83B9BC50A4FA72F28BA0AB7BE4CF4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DefinedBenefitPlanHealthCareCostTrendGroupsDomain_863D88B6652C789E254FBA0AB7BE3BCC" xlink:to="loc_ghc_PostAge65Member_F3B83B9BC50A4FA72F28BA0AB7BE4CF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOperatingActivitiesSegmentAxis" xlink:label="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_41901C0ADA33EEB5B35FBA0AB7BF6D98" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_41901C0ADA33EEB5B35FBA0AB7BF6D98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_B2DED0943DF62A14A34EBA0AB7BF3102_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_41901C0ADA33EEB5B35FBA0AB7BF6D98" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_B2DED0943DF62A14A34EBA0AB7BF3102_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentOperatingActivitiesDomain" xlink:label="loc_us-gaap_SegmentOperatingActivitiesDomain_B2DED0943DF62A14A34EBA0AB7BF3102" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementOperatingActivitiesSegmentAxis_41901C0ADA33EEB5B35FBA0AB7BF6D98" xlink:to="loc_us-gaap_SegmentOperatingActivitiesDomain_B2DED0943DF62A14A34EBA0AB7BF3102" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="loc_us-gaap_SegmentDiscontinuedOperationsMember_93838B4FEFCBB229D7BABA0AB7BFEA74" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentOperatingActivitiesDomain_B2DED0943DF62A14A34EBA0AB7BF3102" xlink:to="loc_us-gaap_SegmentDiscontinuedOperationsMember_93838B4FEFCBB229D7BABA0AB7BFEA74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="loc_us-gaap_ConsolidationItemsAxis_BE3623BE1A6B5DAB093BBA0AB7BFEA44" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_ConsolidationItemsAxis_BE3623BE1A6B5DAB093BBA0AB7BFEA44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_EB9C331D48A7E1255BBDBA0AB7BF66F8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidationItemsAxis_BE3623BE1A6B5DAB093BBA0AB7BFEA44" xlink:to="loc_us-gaap_ConsolidationItemsDomain_EB9C331D48A7E1255BBDBA0AB7BF66F8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_EB9C331D48A7E1255BBDBA0AB7BF66F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidationItemsAxis_BE3623BE1A6B5DAB093BBA0AB7BFEA44" xlink:to="loc_us-gaap_ConsolidationItemsDomain_EB9C331D48A7E1255BBDBA0AB7BF66F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_9ECD6336E07DD8A1095FBA0AB7BF854D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_EB9C331D48A7E1255BBDBA0AB7BF66F8" xlink:to="loc_us-gaap_CorporateNonSegmentMember_9ECD6336E07DD8A1095FBA0AB7BF854D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MultiemployerPlanTypeAxis" xlink:label="loc_us-gaap_MultiemployerPlanTypeAxis_FFF1EC5253E1EB5012FCBA0AB7BF7615" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_10DABC3F47E3F9B6BD4DBA0AB7BABD6E" xlink:to="loc_us-gaap_MultiemployerPlanTypeAxis_FFF1EC5253E1EB5012FCBA0AB7BF7615" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MultiemployerPlansTypeDomain" xlink:label="loc_us-gaap_MultiemployerPlansTypeDomain_9C62CDC550D36BAE2A81BA0AB7BF8555_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MultiemployerPlanTypeAxis_FFF1EC5253E1EB5012FCBA0AB7BF7615" xlink:to="loc_us-gaap_MultiemployerPlansTypeDomain_9C62CDC550D36BAE2A81BA0AB7BF8555_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MultiemployerPlansTypeDomain" xlink:label="loc_us-gaap_MultiemployerPlansTypeDomain_9C62CDC550D36BAE2A81BA0AB7BF8555" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MultiemployerPlanTypeAxis_FFF1EC5253E1EB5012FCBA0AB7BF7615" xlink:to="loc_us-gaap_MultiemployerPlansTypeDomain_9C62CDC550D36BAE2A81BA0AB7BF8555" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MultiemployerPlansPensionMember" xlink:label="loc_us-gaap_MultiemployerPlansPensionMember_003510E2B5C5F1AE1183BA0AB7C001FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MultiemployerPlansTypeDomain_9C62CDC550D36BAE2A81BA0AB7BF8555" xlink:to="loc_us-gaap_MultiemployerPlansPensionMember_003510E2B5C5F1AE1183BA0AB7C001FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod" xlink:label="loc_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_27719F64D4720EAB6CCABA0AB7C0E304" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_27719F64D4720EAB6CCABA0AB7C0E304" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_A633C8C36BED768E25E9BA0AB7C12B3A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_A633C8C36BED768E25E9BA0AB7C12B3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_9B6E3E71E9DC4727E616BA0AB7C19281" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_9B6E3E71E9DC4727E616BA0AB7C19281" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_92D15CDC47EF79A0CB22BA0AB7C1E6E9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_92D15CDC47EF79A0CB22BA0AB7C1E6E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_18A78FF5E47422ECFB8ABA0AB7C1228B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_18A78FF5E47422ECFB8ABA0AB7C1228B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NetPeriodicBenefitForDefinedBenefitPensionPlansExcludingEarlyRetirementProgramSpecialSeparationBenefitExpenseCurtailmentAndSettlement" xlink:label="loc_ghc_NetPeriodicBenefitForDefinedBenefitPensionPlansExcludingEarlyRetirementProgramSpecialSeparationBenefitExpenseCurtailmentAndSettlement_A8273B067824C1568919BA0AB7C1A6EF" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_ghc_NetPeriodicBenefitForDefinedBenefitPensionPlansExcludingEarlyRetirementProgramSpecialSeparationBenefitExpenseCurtailmentAndSettlement_A8273B067824C1568919BA0AB7C1A6EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_CB2EF19C54B828FF269ABA0AB7C2D6F4" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_CB2EF19C54B828FF269ABA0AB7C2D6F4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PercentofPlanAssetsManagedInternallybyCompany" xlink:label="loc_ghc_PercentofPlanAssetsManagedInternallybyCompany_9BB1115CCE51DE033854BA0AB7C26C4E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_ghc_PercentofPlanAssetsManagedInternallybyCompany_9BB1115CCE51DE033854BA0AB7C26C4E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PercentOfPlanAssetsManagedByInvestmentCompanies" xlink:label="loc_ghc_PercentOfPlanAssetsManagedByInvestmentCompanies_7EF4F820758A38D6B38DBA0AB7C2CB20" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_ghc_PercentOfPlanAssetsManagedByInvestmentCompanies_7EF4F820758A38D6B38DBA0AB7C2CB20" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfInvestmentCompaniesManagingPlanAssets" xlink:label="loc_ghc_NumberOfInvestmentCompaniesManagingPlanAssets_7606EBE08E40ED470D3CBA0AB7C24275" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_ghc_NumberOfInvestmentCompaniesManagingPlanAssets_7606EBE08E40ED470D3CBA0AB7C24275" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsSingularEquitySecurityLimitWithoutApprovalOfPlanAdministrator" xlink:label="loc_ghc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsSingularEquitySecurityLimitWithoutApprovalOfPlanAdministrator_8ADFC7B4B7710025875CBA0AB7C2BC83" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_ghc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsSingularEquitySecurityLimitWithoutApprovalOfPlanAdministrator_8ADFC7B4B7710025875CBA0AB7C2BC83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_F262189E190C7CCFACC0BA0AB7C2E1CE" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_F262189E190C7CCFACC0BA0AB7C2E1CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_9862F410061C7770D492BA0AB7C27B8D" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_9862F410061C7770D492BA0AB7C27B8D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfInvestmentsCompanysPensionPlanHeldWhichIndividuallyExceed10PercentOfTotalPlanAssets" xlink:label="loc_ghc_NumberOfInvestmentsCompanysPensionPlanHeldWhichIndividuallyExceed10PercentOfTotalPlanAssets_6361799EED39E55EF0CDBA0AB7C2B4D1" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_ghc_NumberOfInvestmentsCompanysPensionPlanHeldWhichIndividuallyExceed10PercentOfTotalPlanAssets_6361799EED39E55EF0CDBA0AB7C2B4D1" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfForeignCountriesForWhichCompanysPensionPlanHoldsInvestmentsThatExceed10PercentOfTotalPlanAssets" xlink:label="loc_ghc_NumberOfForeignCountriesForWhichCompanysPensionPlanHoldsInvestmentsThatExceed10PercentOfTotalPlanAssets_DECCD1F31E1337C1DA53BA0AB7C2BE8D" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_ghc_NumberOfForeignCountriesForWhichCompanysPensionPlanHoldsInvestmentsThatExceed10PercentOfTotalPlanAssets_DECCD1F31E1337C1DA53BA0AB7C2BE8D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Investments" xlink:label="loc_us-gaap_Investments_2885C0092FEFBDCE7A31BA0AB7C24D39" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_Investments_2885C0092FEFBDCE7A31BA0AB7C24D39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_2A8300108A7686768269BA0AB7C208B7" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_2A8300108A7686768269BA0AB7C208B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_55326C16895EDECCA71FBA0AB7C2D3B2" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_55326C16895EDECCA71FBA0AB7C2D3B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_2CD4DA77EACAB426D301BA0AB7C2C6EE" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_2CD4DA77EACAB426D301BA0AB7C2C6EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDescriptionOfDirectionAndPatternOfChangeForAssumedHealthCareCostTrendRate" xlink:label="loc_us-gaap_DefinedBenefitPlanDescriptionOfDirectionAndPatternOfChangeForAssumedHealthCareCostTrendRate_24130D50BCD2A99E489BBA0AB7C3868F" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanDescriptionOfDirectionAndPatternOfChangeForAssumedHealthCareCostTrendRate_24130D50BCD2A99E489BBA0AB7C3868F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1" xlink:label="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_D9779F9E08E1B4F57891BA0AB7C39C7B" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_D9779F9E08E1B4F57891BA0AB7C39C7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate" xlink:label="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_67C6BF5BAF49A56A74FEBA0AB7C3782B" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_67C6BF5BAF49A56A74FEBA0AB7C3782B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_F2B6D22431E3650CA2F3BA0AB7C32CCC" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_F2B6D22431E3650CA2F3BA0AB7C32CCC" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NumberOfMultiemployerPlansContributedTo" xlink:label="loc_ghc_NumberOfMultiemployerPlansContributedTo_843D0FC7AE42DA737ED0BA0AB7C30888" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_ghc_NumberOfMultiemployerPlansContributedTo_843D0FC7AE42DA737ED0BA0AB7C30888" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MultiemployerPlanContributionsByEmployer" xlink:label="loc_us-gaap_MultiemployerPlanContributionsByEmployer_B4AC757452C870938A5FBA0AB7C327F7" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_MultiemployerPlanContributionsByEmployer_B4AC757452C870938A5FBA0AB7C327F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_AB544E5D4FB3586A98F9BA0AB7C3BE04" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_RetirementBenefitsDisclosureLineItems_793225BBD07D94038BDFBA0AB7C03777" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_AB544E5D4FB3586A98F9BA0AB7C3BE04" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansObligationAssetAndFundingInformationDetails1" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_32DC2394A371BE7B93F0BA0AB7774626" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D8AA1D5AE73E43C2F5C0BA0AB776D862" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_32DC2394A371BE7B93F0BA0AB7774626" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D8AA1D5AE73E43C2F5C0BA0AB776D862" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_B333A4FFEBA33B034F5ABA0AB776D00A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D8AA1D5AE73E43C2F5C0BA0AB776D862" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_B333A4FFEBA33B034F5ABA0AB776D00A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5C78C40F121512CA843ABA0AB77618A9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B333A4FFEBA33B034F5ABA0AB776D00A" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5C78C40F121512CA843ABA0AB77618A9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5C78C40F121512CA843ABA0AB77618A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B333A4FFEBA33B034F5ABA0AB776D00A" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5C78C40F121512CA843ABA0AB77618A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_54CF84A3681002EA690CBA0AB77624E7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5C78C40F121512CA843ABA0AB77618A9" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_54CF84A3681002EA690CBA0AB77624E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_B45BB83C35ACAB871B45BA0AB77634EF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5C78C40F121512CA843ABA0AB77618A9" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_B45BB83C35ACAB871B45BA0AB77634EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_634510D246C69072132FBA0AB77782A7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5C78C40F121512CA843ABA0AB77618A9" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_634510D246C69072132FBA0AB77782A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_32DC2394A371BE7B93F0BA0AB7774626" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_DDF342989A6AE305C900BA0AB7770B57" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_DDF342989A6AE305C900BA0AB7770B57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_5A400909AE68B75561E3BA0AB7778824" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_5A400909AE68B75561E3BA0AB7778824" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_727528B559039619F91FBA0AB777B68D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_727528B559039619F91FBA0AB777B68D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_8DA6DCB174B07E94901CBA0AB777911B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAmendments_8DA6DCB174B07E94901CBA0AB777911B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_D11C0C7EA53118CCAEB2BA0AB777C1B0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_D11C0C7EA53118CCAEB2BA0AB777C1B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation_0789031CE48BABB16DAFBA0AB7777EA1" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation_0789031CE48BABB16DAFBA0AB7777EA1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_4BD1758E0983410401BABA0AB77770BE" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_4BD1758E0983410401BABA0AB77770BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanCurtailments" xlink:label="loc_us-gaap_DefinedBenefitPlanCurtailments_3E2759D7E3E4D66C0F2DBA0AB777F238" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanCurtailments_3E2759D7E3E4D66C0F2DBA0AB777F238" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanSpecialTerminationBenefits" xlink:label="loc_us-gaap_DefinedBenefitPlanSpecialTerminationBenefits_30B60422E778F79EB29FBA0AB77737AE" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanSpecialTerminationBenefits_30B60422E778F79EB29FBA0AB77737AE" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlanBenefitsPaidNet" xlink:label="loc_ghc_DefinedBenefitPlanBenefitsPaidNet_5CFD7257CD2AD95D1A82BA0AB77741E1" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_ghc_DefinedBenefitPlanBenefitsPaidNet_5CFD7257CD2AD95D1A82BA0AB77741E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_8B7710E8787145F03DA5BA0AB777FBA8" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6200B7BF2CE37815E57DBA0AB777ADC8" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_8B7710E8787145F03DA5BA0AB777FBA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C0A96A72F2422BA0572CBA0AB7773FEF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_32DC2394A371BE7B93F0BA0AB7774626" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C0A96A72F2422BA0572CBA0AB7773FEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_180D977059567892D4CBBA0AB7772C95" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C0A96A72F2422BA0572CBA0AB7773FEF" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_180D977059567892D4CBBA0AB7772C95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_E2D9A5C1170F66BF6A6EBA0AB777E73D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C0A96A72F2422BA0572CBA0AB7773FEF" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_E2D9A5C1170F66BF6A6EBA0AB777E73D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_6206AAB602DC542A4798BA0AB7786932" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C0A96A72F2422BA0572CBA0AB7773FEF" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_6206AAB602DC542A4798BA0AB7786932" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_D5920DF057FDFE087EFCBA0AB77860C9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C0A96A72F2422BA0572CBA0AB7773FEF" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_D5920DF057FDFE087EFCBA0AB77860C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_B42CEBBF3165B8146C09BA0AB7781711" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C0A96A72F2422BA0572CBA0AB7773FEF" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_B42CEBBF3165B8146C09BA0AB7781711" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_8E6FA39A05AFD766A939BA0AB778ACF1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_32DC2394A371BE7B93F0BA0AB7774626" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_8E6FA39A05AFD766A939BA0AB778ACF1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansReconciliationOfChangeInPensionPlanAssetsFairValueUsingLevel3InputsDetails11" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_B5880894BFCA44393E9ABA0AB70E10C2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_11DABC0C6295D6CD7F3FBA0AB70D0ECD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_B5880894BFCA44393E9ABA0AB70E10C2" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_11DABC0C6295D6CD7F3FBA0AB70D0ECD" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C8A5933E44CB408625BFBA0AB70ECD39" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_11DABC0C6295D6CD7F3FBA0AB70D0ECD" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C8A5933E44CB408625BFBA0AB70ECD39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E378899D8BD37B587319BA0AB70E1C5F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C8A5933E44CB408625BFBA0AB70ECD39" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E378899D8BD37B587319BA0AB70E1C5F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E378899D8BD37B587319BA0AB70E1C5F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C8A5933E44CB408625BFBA0AB70ECD39" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E378899D8BD37B587319BA0AB70E1C5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_36A5B08DA960B4546688BA0AB70E1DCF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E378899D8BD37B587319BA0AB70E1C5F" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_36A5B08DA960B4546688BA0AB70E1DCF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_CDB6A3ADE230555D6B8BBA0AB70E919F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_B5880894BFCA44393E9ABA0AB70E10C2" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_CDB6A3ADE230555D6B8BBA0AB70E919F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_E38609523502D83BB83CBA0AB70EE1F5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_CDB6A3ADE230555D6B8BBA0AB70E919F" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_E38609523502D83BB83CBA0AB70EE1F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements" xlink:label="loc_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_2D8C043A22108EEF3A63BA0AB70EE5F5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_CDB6A3ADE230555D6B8BBA0AB70E919F" xlink:to="loc_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_2D8C043A22108EEF3A63BA0AB70EE5F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_3AB2BA68FC8EC7168545BA0AB70E19ED" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_CDB6A3ADE230555D6B8BBA0AB70E919F" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_3AB2BA68FC8EC7168545BA0AB70E19ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_EF3F1F04717EC415D45ABA0AB70E7C10" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_CDB6A3ADE230555D6B8BBA0AB70E919F" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_EF3F1F04717EC415D45ABA0AB70E7C10" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D2301AE86A72016E3AAABA0AB7C92A08" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D2301AE86A72016E3AAABA0AB7C92A08" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_D23264BD002882B342A4BA0AB7C973C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D2301AE86A72016E3AAABA0AB7C92A08" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_D23264BD002882B342A4BA0AB7C973C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_C5D0EE437ED148846527BA0AB7C956B6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_D23264BD002882B342A4BA0AB7C973C1" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_C5D0EE437ED148846527BA0AB7C956B6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_C5D0EE437ED148846527BA0AB7C956B6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_D23264BD002882B342A4BA0AB7C973C1" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_C5D0EE437ED148846527BA0AB7C956B6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansMember" xlink:label="loc_ghc_DefinedBenefitPlansMember_73DF8415764F8DA9B7BDBA0AB7C978DA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_C5D0EE437ED148846527BA0AB7C956B6" xlink:to="loc_ghc_DefinedBenefitPlansMember_73DF8415764F8DA9B7BDBA0AB7C978DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_E58449FF7A847B26AC36BA0AB7C9A1AD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_C5D0EE437ED148846527BA0AB7C956B6" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_E58449FF7A847B26AC36BA0AB7C9A1AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_14CE75D845E82BEA69F5BA0AB7C9B1AB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_C5D0EE437ED148846527BA0AB7C956B6" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_14CE75D845E82BEA69F5BA0AB7C9B1AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6E45336DC380793883ABBA0AB7C92A4F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_C5D0EE437ED148846527BA0AB7C956B6" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6E45336DC380793883ABBA0AB7C92A4F" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis" xlink:label="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_38BB21C438F99E1FA8A2BA0AB7C9BED6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D2301AE86A72016E3AAABA0AB7C92A08" xlink:to="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_38BB21C438F99E1FA8A2BA0AB7C9BED6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain" xlink:label="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_B417C531C6F7E817E79EBA0AB7C9B5DD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_38BB21C438F99E1FA8A2BA0AB7C9BED6" xlink:to="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_B417C531C6F7E817E79EBA0AB7C9B5DD_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain" xlink:label="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_B417C531C6F7E817E79EBA0AB7C9B5DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionAxis_38BB21C438F99E1FA8A2BA0AB7C9BED6" xlink:to="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_B417C531C6F7E817E79EBA0AB7C9B5DD" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PeriodicCostMember" xlink:label="loc_ghc_PeriodicCostMember_ECD54F2E76425D65E2CABA0AB7CAD06E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_B417C531C6F7E817E79EBA0AB7C9B5DD" xlink:to="loc_ghc_PeriodicCostMember_ECD54F2E76425D65E2CABA0AB7CAD06E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_BenefitObligationMember" xlink:label="loc_ghc_BenefitObligationMember_C06731EAC6B01EF32231BA0AB7CA02AC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAssumptionDomain_B417C531C6F7E817E79EBA0AB7C9B5DD" xlink:to="loc_ghc_BenefitObligationMember_C06731EAC6B01EF32231BA0AB7CA02AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfNetFundedStatusTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNetFundedStatusTableTextBlock_C0A389422E8F2AA9ADECBA0AB7CA0AFC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfNetFundedStatusTableTextBlock_C0A389422E8F2AA9ADECBA0AB7CA0AFC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_44ABA3F0DE5EF7EBAB40BA0AB7CA4B51" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_44ABA3F0DE5EF7EBAB40BA0AB7CA4B51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAssumptionsUsedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_F247843311ACEA742DE1BA0AB7CA6CF3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_F247843311ACEA742DE1BA0AB7CA6CF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_0F57B0701E6BD2AC7108BA0AB7CACF93" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_0F57B0701E6BD2AC7108BA0AB7CACF93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfNetBenefitCostsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_43DE0F4FBF9C1B42EF39BA0AB7CA3D0E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_43DE0F4FBF9C1B42EF39BA0AB7CA3D0E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock_2BD409C4D895079D2FE2BA0AB7CA2D02" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock_2BD409C4D895079D2FE2BA0AB7CA2D02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAmountsInAccumulatedOtherComprehensiveIncomeLossToBeRecognizedOverNextFiscalYearTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAmountsInAccumulatedOtherComprehensiveIncomeLossToBeRecognizedOverNextFiscalYearTableTextBlock_486679C40DE3804B5847BA0AB7CA2CBB" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfAmountsInAccumulatedOtherComprehensiveIncomeLossToBeRecognizedOverNextFiscalYearTableTextBlock_486679C40DE3804B5847BA0AB7CA2CBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_617931E32A650AEC5DCABA0AB7CAA81E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_617931E32A650AEC5DCABA0AB7CAA81E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_689493DD78412A16ADE7BA0AB7CA67B5" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_689493DD78412A16ADE7BA0AB7CA67B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock_55D74831C4691AF5A21EBA0AB7CABAF6" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock_55D74831C4691AF5A21EBA0AB7CABAF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock_B164EC949F951B6F0D6ABA0AB7CAF7DE" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_367DDFF722033177BB87BA0AB7CAE847" xlink:to="loc_us-gaap_ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock_B164EC949F951B6F0D6ABA0AB7CAF7DE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PensionAndPostretirementPlansTotalBenefitCostDetails5" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_21F2B876A211D7C04062BA0AB75E56C6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_21F2B876A211D7C04062BA0AB75E56C6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_B0097402626D88CBE6FBBA0AB75E9F9F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_21F2B876A211D7C04062BA0AB75E56C6" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_B0097402626D88CBE6FBBA0AB75E9F9F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_F084459775A587F12BF8BA0AB75E1E2E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B0097402626D88CBE6FBBA0AB75E9F9F" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_F084459775A587F12BF8BA0AB75E1E2E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_F084459775A587F12BF8BA0AB75E1E2E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B0097402626D88CBE6FBBA0AB75E9F9F" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_F084459775A587F12BF8BA0AB75E1E2E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_B47B4C006D7DF614DA02BA0AB75EAA7E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_F084459775A587F12BF8BA0AB75E1E2E" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_B47B4C006D7DF614DA02BA0AB75EAA7E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_5EF9E82BEAFCB1D43EC3BA0AB75E5E3F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_F084459775A587F12BF8BA0AB75E1E2E" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_5EF9E82BEAFCB1D43EC3BA0AB75E5E3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_C4D845511A6950CE4F72BA0AB75E1A19" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_F084459775A587F12BF8BA0AB75E1E2E" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_C4D845511A6950CE4F72BA0AB75E1A19" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_57BE812917FBA3696659BA0AB75FF59C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_57BE812917FBA3696659BA0AB75FF59C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_D81282D9C11BD5972103BA0AB75F40E4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_D81282D9C11BD5972103BA0AB75F40E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_F79CFB4683147E291CC4BA0AB75F2C3B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_F79CFB4683147E291CC4BA0AB75F2C3B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_0A1D4B187D3288ED1D16BA0AB75FD282" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_0A1D4B187D3288ED1D16BA0AB75FD282" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_73B4DF937B20F34F54F5BA0AB75F0204" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_73B4DF937B20F34F54F5BA0AB75F0204" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NetPeriodicBenefitForDefinedBenefitPensionPlansExcludingEarlyRetirementProgramSpecialSeparationBenefitExpenseCurtailmentAndSettlement" xlink:label="loc_ghc_NetPeriodicBenefitForDefinedBenefitPensionPlansExcludingEarlyRetirementProgramSpecialSeparationBenefitExpenseCurtailmentAndSettlement_517294F6318CC1326A2EBA0AB75FB1E2" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_ghc_NetPeriodicBenefitForDefinedBenefitPensionPlansExcludingEarlyRetirementProgramSpecialSeparationBenefitExpenseCurtailmentAndSettlement_517294F6318CC1326A2EBA0AB75FB1E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_B388B933FA2E8B50AAE9BA0AB75F2468" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_B388B933FA2E8B50AAE9BA0AB75F2468" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_9690AAC0719193A2B152BA0AB75F4BAD" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_9690AAC0719193A2B152BA0AB75F4BAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod" xlink:label="loc_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_1A95A4C25ECFE27BE076BA0AB75F5C1F" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_1A95A4C25ECFE27BE076BA0AB75F5C1F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_901CAFB23AF029EB5C71BA0AB75F667F" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_901CAFB23AF029EB5C71BA0AB75F667F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_8D6EC93934777619514FBA0AB75F5636" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_8D6EC93934777619514FBA0AB75F5636" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_09CE053ABD2784AC7758BA0AB75FF14E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_8D6EC93934777619514FBA0AB75F5636" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_09CE053ABD2784AC7758BA0AB75FF14E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax_5688A43B05C971262D25BA0AB75F55C7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_8D6EC93934777619514FBA0AB75F5636" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax_5688A43B05C971262D25BA0AB75F55C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_9D587B785136F0D25821BA0AB75F11E3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_8D6EC93934777619514FBA0AB75F5636" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_9D587B785136F0D25821BA0AB75F11E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_CF59E18799D1DE4F93B0BA0AB75FC678" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_8D6EC93934777619514FBA0AB75F5636" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_CF59E18799D1DE4F93B0BA0AB75FC678" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax_635739CB2F032B7563F0BA0AB75F62F9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_8D6EC93934777619514FBA0AB75F5636" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax_635739CB2F032B7563F0BA0AB75F62F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_0749D88BBE6DF3765344BA0AB75FE59E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_8D6EC93934777619514FBA0AB75F5636" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_0749D88BBE6DF3765344BA0AB75FE59E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax" xlink:label="loc_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_AE8FAD26D2D1058C2E6EBA0AB7608907" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_F3BC47D9F0C172C63D2EBA0AB75E269B" xlink:to="loc_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_AE8FAD26D2D1058C2E6EBA0AB7608907" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PropertyPlantAndEquipment" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/PropertyPlantAndEquipmentDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/PropertyPlantAndEquipmentNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0894F2CEA57BCFF8E0A8BA0AB8AE6CD9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_AFEDD61B69FA23950553BA0AB8ADDAA9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0894F2CEA57BCFF8E0A8BA0AB8AE6CD9" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_AFEDD61B69FA23950553BA0AB8ADDAA9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_E874C1B1CFAC190C184EBA0AB8ADC495" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_AFEDD61B69FA23950553BA0AB8ADDAA9" xlink:to="loc_us-gaap_SubsegmentsAxis_E874C1B1CFAC190C184EBA0AB8ADC495" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_AD08C2DD2A12469C91A1BA0AB8AD2937_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_E874C1B1CFAC190C184EBA0AB8ADC495" xlink:to="loc_us-gaap_SubsegmentsDomain_AD08C2DD2A12469C91A1BA0AB8AD2937_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_AD08C2DD2A12469C91A1BA0AB8AD2937" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_E874C1B1CFAC190C184EBA0AB8ADC495" xlink:to="loc_us-gaap_SubsegmentsDomain_AD08C2DD2A12469C91A1BA0AB8AD2937" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_0976B609FA9C791819FABA0AB8AD2FDB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_AD08C2DD2A12469C91A1BA0AB8AD2937" xlink:to="loc_ghc_HigherEducationMember_0976B609FA9C791819FABA0AB8AD2FDB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_9C06258B96C71C613F4FBA0AB8ADB36D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_AFEDD61B69FA23950553BA0AB8ADDAA9" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_9C06258B96C71C613F4FBA0AB8ADB36D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_3404D96F12374A410498BA0AB8ADA7AF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9C06258B96C71C613F4FBA0AB8ADB36D" xlink:to="loc_us-gaap_SegmentDomain_3404D96F12374A410498BA0AB8ADA7AF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_3404D96F12374A410498BA0AB8ADA7AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9C06258B96C71C613F4FBA0AB8ADB36D" xlink:to="loc_us-gaap_SegmentDomain_3404D96F12374A410498BA0AB8ADA7AF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_59E73CD28809F2317F30BA0AB8AD5DA4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3404D96F12374A410498BA0AB8ADA7AF" xlink:to="loc_ghc_EducationMember_59E73CD28809F2317F30BA0AB8AD5DA4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherBusinessesMember" xlink:label="loc_ghc_OtherBusinessesMember_C24AB01041B73B1817D4BA0AB8AD6D86" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3404D96F12374A410498BA0AB8ADA7AF" xlink:to="loc_ghc_OtherBusinessesMember_C24AB01041B73B1817D4BA0AB8AD6D86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1BAFEE0A4DC72A62CE64BA0AB8ADEB23" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_AFEDD61B69FA23950553BA0AB8ADDAA9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1BAFEE0A4DC72A62CE64BA0AB8ADEB23" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_A0EC0F0BF7D7BB508FDABA0AB8AD47F1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1BAFEE0A4DC72A62CE64BA0AB8ADEB23" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_A0EC0F0BF7D7BB508FDABA0AB8AD47F1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_A0EC0F0BF7D7BB508FDABA0AB8AD47F1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1BAFEE0A4DC72A62CE64BA0AB8ADEB23" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_A0EC0F0BF7D7BB508FDABA0AB8AD47F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_A6ED30164886AE63108CBA0AB8ADAAD4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_AFEDD61B69FA23950553BA0AB8ADDAA9" xlink:to="loc_us-gaap_RangeAxis_A6ED30164886AE63108CBA0AB8ADAAD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_66B022C0DA47700B0699BA0AB8AD7D1D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_A6ED30164886AE63108CBA0AB8ADAAD4" xlink:to="loc_us-gaap_RangeMember_66B022C0DA47700B0699BA0AB8AD7D1D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_66B022C0DA47700B0699BA0AB8AD7D1D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_A6ED30164886AE63108CBA0AB8ADAAD4" xlink:to="loc_us-gaap_RangeMember_66B022C0DA47700B0699BA0AB8AD7D1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_7811945991770A61BEF0BA0AB8ADDB9B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_AFEDD61B69FA23950553BA0AB8ADDAA9" xlink:to="loc_dei_LegalEntityAxis_7811945991770A61BEF0BA0AB8ADDB9B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_55CC4779B806AFA7C03CBA0AB8ADA124_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_7811945991770A61BEF0BA0AB8ADDB9B" xlink:to="loc_dei_EntityDomain_55CC4779B806AFA7C03CBA0AB8ADA124_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_55CC4779B806AFA7C03CBA0AB8ADA124" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_7811945991770A61BEF0BA0AB8ADDB9B" xlink:to="loc_dei_EntityDomain_55CC4779B806AFA7C03CBA0AB8ADA124" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForneyMember" xlink:label="loc_ghc_ForneyMember_410F03C68156A93E9B64BA0AB8AD1BE3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_55CC4779B806AFA7C03CBA0AB8ADA124" xlink:to="loc_ghc_ForneyMember_410F03C68156A93E9B64BA0AB8AD1BE3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GrahamHealthcareGroupMember" xlink:label="loc_ghc_GrahamHealthcareGroupMember_17D1C923516FF493A60BBA0AB8AED468" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_55CC4779B806AFA7C03CBA0AB8ADA124" xlink:to="loc_ghc_GrahamHealthcareGroupMember_17D1C923516FF493A60BBA0AB8AED468" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_6160CED848DBCBA10B79BA0AB8AE8A96" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0894F2CEA57BCFF8E0A8BA0AB8AE6CD9" xlink:to="loc_us-gaap_Depreciation_6160CED848DBCBA10B79BA0AB8AE8A96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestCostsCapitalized" xlink:label="loc_us-gaap_InterestCostsCapitalized_F46690C0B75238F2FA98BA0AB8AEBFF6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0894F2CEA57BCFF8E0A8BA0AB8AE6CD9" xlink:to="loc_us-gaap_InterestCostsCapitalized_F46690C0B75238F2FA98BA0AB8AEBFF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TangibleAssetImpairmentCharges" xlink:label="loc_us-gaap_TangibleAssetImpairmentCharges_F001981ECBA7C46EE14DBA0AB8AE2B51" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0894F2CEA57BCFF8E0A8BA0AB8AE6CD9" xlink:to="loc_us-gaap_TangibleAssetImpairmentCharges_F001981ECBA7C46EE14DBA0AB8AE2B51" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/PropertyPlantAndEquipmentTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/RedeemablePreferredStock" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/RedeemablePreferredStockDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems" xlink:label="loc_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_0F4D15160499B6356475BA0AB592DA0E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable" xlink:label="loc_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_D7832F255B5D36C41259BA0AB5923AA9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_0F4D15160499B6356475BA0AB592DA0E" xlink:to="loc_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_D7832F255B5D36C41259BA0AB5923AA9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriorPeriodAdjustmentsAxis" xlink:label="loc_ghc_PriorPeriodAdjustmentsAxis_E0DAE570ABE6568CB23CBA0AB59265C9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_D7832F255B5D36C41259BA0AB5923AA9" xlink:to="loc_ghc_PriorPeriodAdjustmentsAxis_E0DAE570ABE6568CB23CBA0AB59265C9" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriorPeriodAdjustmentsDomain" xlink:label="loc_ghc_PriorPeriodAdjustmentsDomain_90B8606830AD4C9BA8BDBA0AB592B1AF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ghc_PriorPeriodAdjustmentsAxis_E0DAE570ABE6568CB23CBA0AB59265C9" xlink:to="loc_ghc_PriorPeriodAdjustmentsDomain_90B8606830AD4C9BA8BDBA0AB592B1AF_default" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PriorPeriodAdjustmentsDomain" xlink:label="loc_ghc_PriorPeriodAdjustmentsDomain_90B8606830AD4C9BA8BDBA0AB592B1AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ghc_PriorPeriodAdjustmentsAxis_E0DAE570ABE6568CB23CBA0AB59265C9" xlink:to="loc_ghc_PriorPeriodAdjustmentsDomain_90B8606830AD4C9BA8BDBA0AB592B1AF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_PeriodsfromQ32016toQ32017Member" xlink:label="loc_ghc_PeriodsfromQ32016toQ32017Member_31DE1EF35DA3245C9664BA0AB59207D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_PriorPeriodAdjustmentsDomain_90B8606830AD4C9BA8BDBA0AB592B1AF" xlink:to="loc_ghc_PeriodsfromQ32016toQ32017Member_31DE1EF35DA3245C9664BA0AB59207D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustment" xlink:label="loc_us-gaap_PriorPeriodReclassificationAdjustment_BEBF59EA78427B359D00BA0AB5937466" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_0F4D15160499B6356475BA0AB592DA0E" xlink:to="loc_us-gaap_PriorPeriodReclassificationAdjustment_BEBF59EA78427B359D00BA0AB5937466" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnauditedQuarterlyImpactOfCertainItemsDetails2" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_QuarterlyImpactofCertainItemsLineItems" xlink:label="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:type="locator" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_QuarterlyImpactofCertainItemsTable" xlink:label="loc_ghc_QuarterlyImpactofCertainItemsTable_FF0BEDE82F6107FCF831BE71692CA0EE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_QuarterlyImpactofCertainItemsTable_FF0BEDE82F6107FCF831BE71692CA0EE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_A7C2A5479612AB8234EDBE71692CF4E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsTable_FF0BEDE82F6107FCF831BE71692CA0EE" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_A7C2A5479612AB8234EDBE71692CF4E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_6A8778EF2ED87028A2E7BE71692C684C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A7C2A5479612AB8234EDBE71692CF4E1" xlink:to="loc_us-gaap_SegmentDomain_6A8778EF2ED87028A2E7BE71692C684C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_6A8778EF2ED87028A2E7BE71692C684C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A7C2A5479612AB8234EDBE71692CF4E1" xlink:to="loc_us-gaap_SegmentDomain_6A8778EF2ED87028A2E7BE71692C684C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EducationMember" xlink:label="loc_ghc_EducationMember_41E1CAA538895DC8A72ABE71692C0CFB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_6A8778EF2ED87028A2E7BE71692C684C" xlink:to="loc_ghc_EducationMember_41E1CAA538895DC8A72ABE71692C0CFB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherBusinessesMember" xlink:label="loc_ghc_OtherBusinessesMember_2A05D3C33F799BF94EF2BE71692C03CD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_6A8778EF2ED87028A2E7BE71692C684C" xlink:to="loc_ghc_OtherBusinessesMember_2A05D3C33F799BF94EF2BE71692C03CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_7B584207EC7B9A7120F5BE71692CD1A9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsTable_FF0BEDE82F6107FCF831BE71692CA0EE" xlink:to="loc_us-gaap_SubsegmentsAxis_7B584207EC7B9A7120F5BE71692CD1A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_C39F55C80047731596C8BE71692D4DC2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_7B584207EC7B9A7120F5BE71692CD1A9" xlink:to="loc_us-gaap_SubsegmentsDomain_C39F55C80047731596C8BE71692D4DC2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_C39F55C80047731596C8BE71692D4DC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_7B584207EC7B9A7120F5BE71692CD1A9" xlink:to="loc_us-gaap_SubsegmentsDomain_C39F55C80047731596C8BE71692D4DC2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_KaplanInternationalMember" xlink:label="loc_ghc_KaplanInternationalMember_5DAA7D1F2EFEC624E13BBE71692D2D65" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_C39F55C80047731596C8BE71692D4DC2" xlink:to="loc_ghc_KaplanInternationalMember_5DAA7D1F2EFEC624E13BBE71692D2D65" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HigherEducationMember" xlink:label="loc_ghc_HigherEducationMember_F74A60005EB03AC69B05BE71692D441E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_C39F55C80047731596C8BE71692D4DC2" xlink:to="loc_ghc_HigherEducationMember_F74A60005EB03AC69B05BE71692D441E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_RestructuringAndRelatedChargesNetofTax" xlink:label="loc_ghc_RestructuringAndRelatedChargesNetofTax_F018DFFE591436496978BE71692DAC90" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_RestructuringAndRelatedChargesNetofTax_F018DFFE591436496978BE71692DAC90" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarningsPerShareDilutedRestructuringAndRelatedCharges" xlink:label="loc_ghc_EarningsPerShareDilutedRestructuringAndRelatedCharges_6B22DCC3B3370412B4B9BE71692D38C6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EarningsPerShareDilutedRestructuringAndRelatedCharges_6B22DCC3B3370412B4B9BE71692D38C6" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ImpairmentOfGoodwillAndOtherLongLivedAssetsNetofTax" xlink:label="loc_ghc_ImpairmentOfGoodwillAndOtherLongLivedAssetsNetofTax_2F3BE11D7D3D54A7F5A2BE71692D467D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_ImpairmentOfGoodwillAndOtherLongLivedAssetsNetofTax_2F3BE11D7D3D54A7F5A2BE71692D467D" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarningsPerShareDilutedImpairmentOfGoodwillAndOtherLongLivedAssets" xlink:label="loc_ghc_EarningsPerShareDilutedImpairmentOfGoodwillAndOtherLongLivedAssets_51D4E04CCD8841900136BE71692E486B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EarningsPerShareDilutedImpairmentOfGoodwillAndOtherLongLivedAssets_51D4E04CCD8841900136BE71692E486B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ForeignCurrencyTransactionGainLossUnrealizedNetofTax" xlink:label="loc_ghc_ForeignCurrencyTransactionGainLossUnrealizedNetofTax_B1BB9BBBC4F8F9A2A2F6BE71692ED7EA" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_ForeignCurrencyTransactionGainLossUnrealizedNetofTax_B1BB9BBBC4F8F9A2A2F6BE71692ED7EA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarningsPerShareDilutedForeignCurrencyTransactionGainLossUnrealized" xlink:label="loc_ghc_EarningsPerShareDilutedForeignCurrencyTransactionGainLossUnrealized_4E65EDA4FBA785C2EB1CBE71692EFD44" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EarningsPerShareDilutedForeignCurrencyTransactionGainLossUnrealized_4E65EDA4FBA785C2EB1CBE71692EFD44" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NetDeferredTaxBenefit" xlink:label="loc_ghc_NetDeferredTaxBenefit_FEB3C465C8862BBC8D86BE71692E5811" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_NetDeferredTaxBenefit_FEB3C465C8862BBC8D86BE71692E5811" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarningsPerShareDilutedNetDeferredTaxBenefit" xlink:label="loc_ghc_EarningsPerShareDilutedNetDeferredTaxBenefit_AC73C2073A28D5CB3E67BE71692ECC7E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EarningsPerShareDilutedNetDeferredTaxBenefit_AC73C2073A28D5CB3E67BE71692ECC7E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount" xlink:label="loc_ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount_26E85B9A018743877D51BE71692EFF2E" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount_26E85B9A018743877D51BE71692EFF2E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarningsPerShareDilutedEffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefit" xlink:label="loc_ghc_EarningsPerShareDilutedEffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefit_4D7C3D7B4088C5F7760DBE71692E1EA4" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EarningsPerShareDilutedEffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefit_4D7C3D7B4088C5F7760DBE71692E1EA4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SettlementGainNetOfTax" xlink:label="loc_ghc_SettlementGainNetOfTax_0C0C7EC91DD494450FF4BE71692EA306" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_SettlementGainNetOfTax_0C0C7EC91DD494450FF4BE71692EA306" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarningsPerShareDilutedSettlementGain" xlink:label="loc_ghc_EarningsPerShareDilutedSettlementGain_2D06BECD874F73DBC789BE71692E7551" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EarningsPerShareDilutedSettlementGain_2D06BECD874F73DBC789BE71692E7551" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NonoperatingGainLossFromSalesOfLandAndMarketableEquitySecuritiesNetOfTax" xlink:label="loc_ghc_NonoperatingGainLossFromSalesOfLandAndMarketableEquitySecuritiesNetOfTax_3999FF8B7006D17F186FBE71692ECE48" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_NonoperatingGainLossFromSalesOfLandAndMarketableEquitySecuritiesNetOfTax_3999FF8B7006D17F186FBE71692ECE48" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarningsPerShareDilutedNonoperatingGainLossFromSalesOfLandAndMarketableEquitySecurities" xlink:label="loc_ghc_EarningsPerShareDilutedNonoperatingGainLossFromSalesOfLandAndMarketableEquitySecurities_E0C0F6D117A8C7B72982BE71692FA568" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EarningsPerShareDilutedNonoperatingGainLossFromSalesOfLandAndMarketableEquitySecurities_E0C0F6D117A8C7B72982BE71692FA568" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NetNonoperatingGainLossSaleOfBusinessesAndInvestmentsAndFormationOfJointVentureNetOfTax" xlink:label="loc_ghc_NetNonoperatingGainLossSaleOfBusinessesAndInvestmentsAndFormationOfJointVentureNetOfTax_C461DB1F2D2955C8438BBE71692FBBF8" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_NetNonoperatingGainLossSaleOfBusinessesAndInvestmentsAndFormationOfJointVentureNetOfTax_C461DB1F2D2955C8438BBE71692FBBF8" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarningsPerShareDilutedNetNonoperatingGainLossSaleofBusinessesAndInvestmentsAndFormationOfJointVenture" xlink:label="loc_ghc_EarningsPerShareDilutedNetNonoperatingGainLossSaleofBusinessesAndInvestmentsAndFormationOfJointVenture_BF7A15DB07903D1C87BCBE71692F7B89" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EarningsPerShareDilutedNetNonoperatingGainLossSaleofBusinessesAndInvestmentsAndFormationOfJointVenture_BF7A15DB07903D1C87BCBE71692F7B89" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_NonoperatingExpenseWritedownOfCostAndEquityMethodInvestmentsNetOfTax" xlink:label="loc_ghc_NonoperatingExpenseWritedownOfCostAndEquityMethodInvestmentsNetOfTax_994E0BB4D2AD16A87517BE71692FD2DF" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_NonoperatingExpenseWritedownOfCostAndEquityMethodInvestmentsNetOfTax_994E0BB4D2AD16A87517BE71692FD2DF" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EarningsPerShareDilutedNonoperatingExpenseWritedownOfCostAndEquityMethodInvestments" xlink:label="loc_ghc_EarningsPerShareDilutedNonoperatingExpenseWritedownOfCostAndEquityMethodInvestments_DDEC9B4B383F7EFC974BBE71692FF7FA" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_EarningsPerShareDilutedNonoperatingExpenseWritedownOfCostAndEquityMethodInvestments_DDEC9B4B383F7EFC974BBE71692FF7FA" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GainOnSaleOfLandNetOfTax" xlink:label="loc_ghc_GainOnSaleOfLandNetOfTax_8968F5A46342ADD5A12DBE71692F450C" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_ghc_GainOnSaleOfLandNetOfTax_8968F5A46342ADD5A12DBE71692F450C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustment" xlink:label="loc_us-gaap_PriorPeriodReclassificationAdjustment_D19F1921F9BE8E7A9937BE71692F73DC" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_QuarterlyImpactofCertainItemsLineItems_204DF080FBAFD8EE9040BE71692DCFB1" xlink:to="loc_us-gaap_PriorPeriodReclassificationAdjustment_D19F1921F9BE8E7A9937BE71692F73DC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnauditedQuarterlyResultsDetails1" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfQuarterlyOperatingResultsAndComprehensiveIncomeUnauditedTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="ghc-20171231.xsd#ghc_SummaryOfSignificantAccountingPoliciesLineItems" xlink:label="loc_ghc_SummaryOfSignificantAccountingPoliciesLineItems_C338579C40937F794377BA0AB94EE5A2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A28E0DFD7B7C88C45CD2BA0AB94C816A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ghc_SummaryOfSignificantAccountingPoliciesLineItems_C338579C40937F794377BA0AB94EE5A2" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A28E0DFD7B7C88C45CD2BA0AB94C816A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_042446B19F75332C7817BA0AB94CD90B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A28E0DFD7B7C88C45CD2BA0AB94C816A" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_042446B19F75332C7817BA0AB94CD90B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_B2628B375E4F8CDBCDE0BA0AB94CE3B4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_042446B19F75332C7817BA0AB94CD90B" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_B2628B375E4F8CDBCDE0BA0AB94CE3B4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_B2628B375E4F8CDBCDE0BA0AB94CE3B4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_042446B19F75332C7817BA0AB94CD90B" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_B2628B375E4F8CDBCDE0BA0AB94CE3B4" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AdvertisingRevenueMember" xlink:label="loc_ghc_AdvertisingRevenueMember_DB7C91F9B3B3C13B14BCBA0AB94C9E9E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_B2628B375E4F8CDBCDE0BA0AB94CE3B4" xlink:to="loc_ghc_AdvertisingRevenueMember_DB7C91F9B3B3C13B14BCBA0AB94C9E9E" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_OtherrevenueMember" xlink:label="loc_ghc_OtherrevenueMember_4EED7428E0C371F3BE9EBA0AB94D475D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_B2628B375E4F8CDBCDE0BA0AB94CE3B4" xlink:to="loc_ghc_OtherrevenueMember_4EED7428E0C371F3BE9EBA0AB94D475D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B1651EDF5AC077E6743BBA0AB94D9DB3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A28E0DFD7B7C88C45CD2BA0AB94C816A" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B1651EDF5AC077E6743BBA0AB94D9DB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_1515ABD74A5D63CB602DBA0AB94DDE05_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B1651EDF5AC077E6743BBA0AB94D9DB3" xlink:to="loc_us-gaap_TypeOfAdoptionMember_1515ABD74A5D63CB602DBA0AB94DDE05_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_1515ABD74A5D63CB602DBA0AB94DDE05" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B1651EDF5AC077E6743BBA0AB94D9DB3" xlink:to="loc_us-gaap_TypeOfAdoptionMember_1515ABD74A5D63CB602DBA0AB94DDE05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_1D8FD0773F7F18BD6392BA0AB94DFB37" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A28E0DFD7B7C88C45CD2BA0AB94C816A" xlink:to="loc_us-gaap_RangeAxis_1D8FD0773F7F18BD6392BA0AB94DFB37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_3DD984F25A0F6E592393BA0AB94D3F8C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_1D8FD0773F7F18BD6392BA0AB94DFB37" xlink:to="loc_us-gaap_RangeMember_3DD984F25A0F6E592393BA0AB94D3F8C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_3DD984F25A0F6E592393BA0AB94D3F8C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_1D8FD0773F7F18BD6392BA0AB94DFB37" xlink:to="loc_us-gaap_RangeMember_3DD984F25A0F6E592393BA0AB94D3F8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_D3D825681E233D3B4163BA0AB94D5C37" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_3DD984F25A0F6E592393BA0AB94D3F8C" xlink:to="loc_us-gaap_MinimumMember_D3D825681E233D3B4163BA0AB94D5C37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_E0B45C134C4ABB003903BA0AB94D16DE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_3DD984F25A0F6E592393BA0AB94D3F8C" xlink:to="loc_us-gaap_MaximumMember_E0B45C134C4ABB003903BA0AB94D16DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_DB8EB48C64860E8EC843BA0AB94D685C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A28E0DFD7B7C88C45CD2BA0AB94C816A" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_DB8EB48C64860E8EC843BA0AB94D685C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_28D2A792B888FD8272FABA0AB94DCCE7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_DB8EB48C64860E8EC843BA0AB94D685C" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_28D2A792B888FD8272FABA0AB94DCCE7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_28D2A792B888FD8272FABA0AB94DCCE7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_DB8EB48C64860E8EC843BA0AB94D685C" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_28D2A792B888FD8272FABA0AB94DCCE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MachineryAndEquipmentMember" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_DFB29C583F95425C9951BA0AB94DF561" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_28D2A792B888FD8272FABA0AB94DCCE7" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_DFB29C583F95425C9951BA0AB94DF561" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_062F9123BCF60F2AC570BA0AB94D921D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_28D2A792B888FD8272FABA0AB94DCCE7" xlink:to="loc_us-gaap_BuildingMember_062F9123BCF60F2AC570BA0AB94D921D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_841E22D4A996561BC549BA0AB94D76C1" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A28E0DFD7B7C88C45CD2BA0AB94C816A" xlink:to="loc_dei_LegalEntityAxis_841E22D4A996561BC549BA0AB94D76C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_F8A43291D4B00EC749D8BA0AB94D0AD2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_841E22D4A996561BC549BA0AB94D76C1" xlink:to="loc_dei_EntityDomain_F8A43291D4B00EC749D8BA0AB94D0AD2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_F8A43291D4B00EC749D8BA0AB94D0AD2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_841E22D4A996561BC549BA0AB94D76C1" xlink:to="loc_dei_EntityDomain_F8A43291D4B00EC749D8BA0AB94D0AD2" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_GrahamHealthcareGroupMember" xlink:label="loc_ghc_GrahamHealthcareGroupMember_D91BF90C1939D60355ADBA0AB94D218A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_F8A43291D4B00EC749D8BA0AB94D0AD2" xlink:to="loc_ghc_GrahamHealthcareGroupMember_D91BF90C1939D60355ADBA0AB94D218A" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_HooverTreatedWoodProductsMember" xlink:label="loc_ghc_HooverTreatedWoodProductsMember_2AFBCD0F993859052ACDBA0AB94D2094" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_F8A43291D4B00EC749D8BA0AB94D0AD2" xlink:to="loc_ghc_HooverTreatedWoodProductsMember_2AFBCD0F993859052ACDBA0AB94D2094" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustment" xlink:label="loc_us-gaap_PriorPeriodReclassificationAdjustment_9672A307329629FD35E2BA0AB94EFF82" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SummaryOfSignificantAccountingPoliciesLineItems_C338579C40937F794377BA0AB94EE5A2" xlink:to="loc_us-gaap_PriorPeriodReclassificationAdjustment_9672A307329629FD35E2BA0AB94EFF82" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_InvestmentMaturityLengthForClassificationAsCashAndCashEquivalents" xlink:label="loc_ghc_InvestmentMaturityLengthForClassificationAsCashAndCashEquivalents_62E255B8F77C3BAFC7ECBA0AB94E8B88" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SummaryOfSignificantAccountingPoliciesLineItems_C338579C40937F794377BA0AB94EE5A2" xlink:to="loc_ghc_InvestmentMaturityLengthForClassificationAsCashAndCashEquivalents_62E255B8F77C3BAFC7ECBA0AB94E8B88" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AmountOfTimeBetweenReceiptAndApplicationOfFundsMaximum" xlink:label="loc_ghc_AmountOfTimeBetweenReceiptAndApplicationOfFundsMaximum_B76C49A1A67CDA527A49BA0AB94E8D2E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SummaryOfSignificantAccountingPoliciesLineItems_C338579C40937F794377BA0AB94EE5A2" xlink:to="loc_ghc_AmountOfTimeBetweenReceiptAndApplicationOfFundsMaximum_B76C49A1A67CDA527A49BA0AB94E8D2E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_4CB79096DD47220EE2FCBA0AB94EAC7C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SummaryOfSignificantAccountingPoliciesLineItems_C338579C40937F794377BA0AB94EE5A2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_4CB79096DD47220EE2FCBA0AB94EAC7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_3DD3B6C88FBC3208B51FBA0AB94E131E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SummaryOfSignificantAccountingPoliciesLineItems_C338579C40937F794377BA0AB94EE5A2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_3DD3B6C88FBC3208B51FBA0AB94E131E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_84DE1A63AABEE70E7764BA0AB94E1C66" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ghc_SummaryOfSignificantAccountingPoliciesLineItems_C338579C40937F794377BA0AB94EE5A2" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_84DE1A63AABEE70E7764BA0AB94E1C66" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesPolicy" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesRecentlyAdoptedAndIssuedAccountingPronoucementsDetails1" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ItemEffectedLineItems" xlink:label="loc_us-gaap_ItemEffectedLineItems_2B71D4394AB272C39A24BECF90065683" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsTable" xlink:label="loc_us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsTable_1B318F92581026A0EBE0BECF9004ED5E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ItemEffectedLineItems_2B71D4394AB272C39A24BECF90065683" xlink:to="loc_us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsTable_1B318F92581026A0EBE0BECF9004ED5E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsAxis_FD0334970BF1C2C5AABDBECF9005DF97" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsTable_1B318F92581026A0EBE0BECF9004ED5E" xlink:to="loc_us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsAxis_FD0334970BF1C2C5AABDBECF9005DF97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingGuidanceMember" xlink:label="loc_us-gaap_AccountingGuidanceMember_1CE720C40C89FC2D2843BECF90050F24_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsAxis_FD0334970BF1C2C5AABDBECF9005DF97" xlink:to="loc_us-gaap_AccountingGuidanceMember_1CE720C40C89FC2D2843BECF90050F24_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingGuidanceMember" xlink:label="loc_us-gaap_AccountingGuidanceMember_1CE720C40C89FC2D2843BECF90050F24" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsAxis_FD0334970BF1C2C5AABDBECF9005DF97" xlink:to="loc_us-gaap_AccountingGuidanceMember_1CE720C40C89FC2D2843BECF90050F24" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreviousAccountingGuidanceMember" xlink:label="loc_us-gaap_PreviousAccountingGuidanceMember_14E7E35E575FD4AF80A5BECF90052CFC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountingGuidanceMember_1CE720C40C89FC2D2843BECF90050F24" xlink:to="loc_us-gaap_PreviousAccountingGuidanceMember_14E7E35E575FD4AF80A5BECF90052CFC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementMember" xlink:label="loc_us-gaap_NewAccountingPronouncementMember_C5D2762EBAACF609BB50BECF9006E13C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountingGuidanceMember_1CE720C40C89FC2D2843BECF90050F24" xlink:to="loc_us-gaap_NewAccountingPronouncementMember_C5D2762EBAACF609BB50BECF9006E13C" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_ASU201707AdoptionMemberMember" xlink:label="loc_ghc_ASU201707AdoptionMemberMember_C39251848E77B5B4BB7CBECF90064F02" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountingGuidanceMember_1CE720C40C89FC2D2843BECF90050F24" xlink:to="loc_ghc_ASU201707AdoptionMemberMember_C39251848E77B5B4BB7CBECF90064F02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_A4B526F0F2C59D868018BECF900635DB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ItemEffectedLineItems_2B71D4394AB272C39A24BECF90065683" xlink:to="loc_us-gaap_OperatingIncomeLoss_A4B526F0F2C59D868018BECF900635DB" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_Nonoperatingpensionandpostretirementincome" xlink:label="loc_ghc_Nonoperatingpensionandpostretirementincome_23C3D1B9397E06B41063BECF9006E004" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ItemEffectedLineItems_2B71D4394AB272C39A24BECF90065683" xlink:to="loc_ghc_Nonoperatingpensionandpostretirementincome_23C3D1B9397E06B41063BECF9006E004" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2A231B2391F4D833C6E2BECF900678F1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ItemEffectedLineItems_2B71D4394AB272C39A24BECF90065683" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2A231B2391F4D833C6E2BECF900678F1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesRecentlyAdoptedAndIssuedAccountingPronouncementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E3A07367B2852BF4F1E5BED022DE3EB5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E3A07367B2852BF4F1E5BED022DE3EB5" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_7FB9EAE36E73D699516BBED022D743FA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_7FB9EAE36E73D699516BBED022D743FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_78B2354A42F13F50F6B3BED022D79EAF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_7FB9EAE36E73D699516BBED022D743FA" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_78B2354A42F13F50F6B3BED022D79EAF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_78B2354A42F13F50F6B3BED022D79EAF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_7FB9EAE36E73D699516BBED022D743FA" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_78B2354A42F13F50F6B3BED022D79EAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_5F0883EEF91D718ED0D4BED022D77E70" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_5F0883EEF91D718ED0D4BED022D77E70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_33105D9536E89B4ED3E1BED022D7E165_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5F0883EEF91D718ED0D4BED022D77E70" xlink:to="loc_us-gaap_EquityComponentDomain_33105D9536E89B4ED3E1BED022D7E165_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_33105D9536E89B4ED3E1BED022D7E165" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5F0883EEF91D718ED0D4BED022D77E70" xlink:to="loc_us-gaap_EquityComponentDomain_33105D9536E89B4ED3E1BED022D7E165" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_FA7E88A5C785B0F208FEBED022D72E57" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_33105D9536E89B4ED3E1BED022D7E165" xlink:to="loc_us-gaap_RetainedEarningsMember_FA7E88A5C785B0F208FEBED022D72E57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_2B517E38DCD8753274FDBED022D8C0AE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_33105D9536E89B4ED3E1BED022D7E165" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_2B517E38DCD8753274FDBED022D8C0AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_BCC4C6BE25912511EA1BBED022DDFDFD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_BCC4C6BE25912511EA1BBED022DDFDFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_F5DE4908317F86F776B7BED022DDE321_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_BCC4C6BE25912511EA1BBED022DDFDFD" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_F5DE4908317F86F776B7BED022DDE321_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_F5DE4908317F86F776B7BED022DDE321" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_BCC4C6BE25912511EA1BBED022DDFDFD" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_F5DE4908317F86F776B7BED022DDE321" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_0A9CA41FA7E75EC07717BED022DD952E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_0A9CA41FA7E75EC07717BED022DD952E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_23D53E9489E4794BC369BED022DD8B84_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_0A9CA41FA7E75EC07717BED022DD952E" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_23D53E9489E4794BC369BED022DD8B84_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_23D53E9489E4794BC369BED022DD8B84" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_0A9CA41FA7E75EC07717BED022DD952E" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_23D53E9489E4794BC369BED022DD8B84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_CE417A648C21D09A4821BED022DD5830" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_23D53E9489E4794BC369BED022DD8B84" xlink:to="loc_us-gaap_RetainedEarningsMember_CE417A648C21D09A4821BED022DD5830" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_78BCC9EE3017E56CD8C2BED022DD58FD" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_78BCC9EE3017E56CD8C2BED022DD58FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_5858E8FF2D74FA4743D0BED022DDDBFB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_78BCC9EE3017E56CD8C2BED022DD58FD" xlink:to="loc_us-gaap_TypeOfAdoptionMember_5858E8FF2D74FA4743D0BED022DDDBFB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_5858E8FF2D74FA4743D0BED022DDDBFB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_78BCC9EE3017E56CD8C2BED022DD58FD" xlink:to="loc_us-gaap_TypeOfAdoptionMember_5858E8FF2D74FA4743D0BED022DDDBFB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingStandardsUpdate201601Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201601Member_F920436CDFC7704E5187BED022DD1867" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_5858E8FF2D74FA4743D0BED022DDDBFB" xlink:to="loc_us-gaap_AccountingStandardsUpdate201601Member_F920436CDFC7704E5187BED022DD1867" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_AccountingStandardsUpdate201802Member" xlink:label="loc_ghc_AccountingStandardsUpdate201802Member_29C7224C62F56C8C1EB1BED022DDA8E5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_5858E8FF2D74FA4743D0BED022DDDBFB" xlink:to="loc_ghc_AccountingStandardsUpdate201802Member_29C7224C62F56C8C1EB1BED022DDA8E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201409Member_A1E64AB7756A4DC11F79BED022DD03BE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_5858E8FF2D74FA4743D0BED022DDDBFB" xlink:to="loc_us-gaap_AccountingStandardsUpdate201409Member_A1E64AB7756A4DC11F79BED022DD03BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis" xlink:label="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_330CA40622832FB78B1CBED022DD5628" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:to="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_330CA40622832FB78B1CBED022DD5628" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ChangeInAccountingPrincipleMember" xlink:label="loc_us-gaap_ChangeInAccountingPrincipleMember_81382295C47D7172E1B9BED022DDF844_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_330CA40622832FB78B1CBED022DD5628" xlink:to="loc_us-gaap_ChangeInAccountingPrincipleMember_81382295C47D7172E1B9BED022DDF844_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ChangeInAccountingPrincipleMember" xlink:label="loc_us-gaap_ChangeInAccountingPrincipleMember_81382295C47D7172E1B9BED022DDF844" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_330CA40622832FB78B1CBED022DD5628" xlink:to="loc_us-gaap_ChangeInAccountingPrincipleMember_81382295C47D7172E1B9BED022DDF844" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_6BFC3145503DA28CCCDABED022DEE9CF" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:to="loc_us-gaap_StatementScenarioAxis_6BFC3145503DA28CCCDABED022DEE9CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_AF767591542218CE96ECBED022DE0C6E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_6BFC3145503DA28CCCDABED022DEE9CF" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_AF767591542218CE96ECBED022DE0C6E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_AF767591542218CE96ECBED022DE0C6E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_6BFC3145503DA28CCCDABED022DEE9CF" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_AF767591542218CE96ECBED022DE0C6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_9A9B133271C1C2483460BED022DE8182" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_AF767591542218CE96ECBED022DE0C6E" xlink:to="loc_us-gaap_ScenarioForecastMember_9A9B133271C1C2483460BED022DE8182" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_8BB1F2BEE20DD07D2355BED022DE3AAD" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D003596CD95874584FD6BED022D71356" xlink:to="loc_us-gaap_RangeAxis_8BB1F2BEE20DD07D2355BED022DE3AAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_2AC7278FBC4374A00FD5BED022DE6E2A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_8BB1F2BEE20DD07D2355BED022DE3AAD" xlink:to="loc_us-gaap_RangeMember_2AC7278FBC4374A00FD5BED022DE6E2A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_2AC7278FBC4374A00FD5BED022DE6E2A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_8BB1F2BEE20DD07D2355BED022DE3AAD" xlink:to="loc_us-gaap_RangeMember_2AC7278FBC4374A00FD5BED022DE6E2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_E35EA90FD0BE1D6B3CDEBED022DEB015" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_2AC7278FBC4374A00FD5BED022DE6E2A" xlink:to="loc_us-gaap_MinimumMember_E35EA90FD0BE1D6B3CDEBED022DEB015" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_1C4AE18CADB872C0D57ABED022DEEAD3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_2AC7278FBC4374A00FD5BED022DE6E2A" xlink:to="loc_us-gaap_MaximumMember_1C4AE18CADB872C0D57ABED022DEEAD3" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_TaxCutsandJobsAct2017ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarnings" xlink:label="loc_ghc_TaxCutsandJobsAct2017ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarnings_250361CAF7DCDD836C98BED022DE8B9C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E3A07367B2852BF4F1E5BED022DE3EB5" xlink:to="loc_ghc_TaxCutsandJobsAct2017ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarnings_250361CAF7DCDD836C98BED022DE8B9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_B8AD533AFF52B22B2758BED022DE917B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E3A07367B2852BF4F1E5BED022DE3EB5" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_B8AD533AFF52B22B2758BED022DE917B" xlink:type="arc" />
    <link:loc xlink:href="ghc-20171231.xsd#ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount" xlink:label="loc_ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount_2A2B3F853A87C2870B30BED022DEF98A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E3A07367B2852BF4F1E5BED022DE3EB5" xlink:to="loc_ghc_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount_2A2B3F853A87C2870B30BED022DEF98A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.ghco.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_65C1B7FA6968365DF689BA0AB952931F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_3277E89FE17E6402AE1ABA0AB95259F0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_65C1B7FA6968365DF689BA0AB952931F" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_3277E89FE17E6402AE1ABA0AB95259F0" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_3CEB0C94FEE363EDB3B3BA0AB9526EF4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_3277E89FE17E6402AE1ABA0AB95259F0" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_3CEB0C94FEE363EDB3B3BA0AB9526EF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_B97C650C2B435771DF15BA0AB952BDFD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_3CEB0C94FEE363EDB3B3BA0AB9526EF4" xlink:to="loc_us-gaap_TypeOfAdoptionMember_B97C650C2B435771DF15BA0AB952BDFD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_B97C650C2B435771DF15BA0AB952BDFD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_3CEB0C94FEE363EDB3B3BA0AB9526EF4" xlink:to="loc_us-gaap_TypeOfAdoptionMember_B97C650C2B435771DF15BA0AB952BDFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis" xlink:label="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_C3A032D1841105DC177CBA0AB952E51B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_3277E89FE17E6402AE1ABA0AB95259F0" xlink:to="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_C3A032D1841105DC177CBA0AB952E51B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ChangeInAccountingPrincipleMember" xlink:label="loc_us-gaap_ChangeInAccountingPrincipleMember_5326411DC4D1E53FDD5CBA0AB9529E6F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_C3A032D1841105DC177CBA0AB952E51B" xlink:to="loc_us-gaap_ChangeInAccountingPrincipleMember_5326411DC4D1E53FDD5CBA0AB9529E6F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ChangeInAccountingPrincipleMember" xlink:label="loc_us-gaap_ChangeInAccountingPrincipleMember_5326411DC4D1E53FDD5CBA0AB9529E6F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_C3A032D1841105DC177CBA0AB952E51B" xlink:to="loc_us-gaap_ChangeInAccountingPrincipleMember_5326411DC4D1E53FDD5CBA0AB9529E6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_6B3DF273C4815F366034BA0AB952AAB2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_3277E89FE17E6402AE1ABA0AB95259F0" xlink:to="loc_us-gaap_StatementScenarioAxis_6B3DF273C4815F366034BA0AB952AAB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_D95A2C192E25195DCF4FBA0AB9520726_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_6B3DF273C4815F366034BA0AB952AAB2" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_D95A2C192E25195DCF4FBA0AB9520726_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_D95A2C192E25195DCF4FBA0AB9520726" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_6B3DF273C4815F366034BA0AB952AAB2" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_D95A2C192E25195DCF4FBA0AB9520726" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfProspectiveAdoptionOfNewAccountingPronouncementsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfProspectiveAdoptionOfNewAccountingPronouncementsTableTextBlock_3E7607715251D86C1840BA0AB952AF09" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_65C1B7FA6968365DF689BA0AB952931F" xlink:to="loc_us-gaap_ScheduleOfProspectiveAdoptionOfNewAccountingPronouncementsTableTextBlock_3E7607715251D86C1840BA0AB952AF09" xlink:type="arc" />
  </link:definitionLink>
</link:linkbase>
