<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva, formerly WebFilings-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="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">
  <roleRef roleURI="http://www.cmegroup.com/role/AccumulatedOtherComprehensiveIncomeDetails" xlink:href="cme-20140630.xsd#AccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/AccumulatedOtherComprehensiveIncomeNotes" xlink:href="cme-20140630.xsd#AccumulatedOtherComprehensiveIncomeNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/AccumulatedOtherComprehensiveIncomeTables" xlink:href="cme-20140630.xsd#AccumulatedOtherComprehensiveIncomeTables" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/BasisOfPresentation" xlink:href="cme-20140630.xsd#BasisOfPresentation" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/ConsolidatedBalanceSheets" xlink:href="cme-20140630.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="cme-20140630.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="cme-20140630.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="cme-20140630.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/ConsolidatedStatementsOfIncome" xlink:href="cme-20140630.xsd#ConsolidatedStatementsOfIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/ConsolidatedStatementsOfShareholdersEquity" xlink:href="cme-20140630.xsd#ConsolidatedStatementsOfShareholdersEquity" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/ConsolidatedStatementsOfShareholdersEquityParenthetical" xlink:href="cme-20140630.xsd#ConsolidatedStatementsOfShareholdersEquityParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/Contingencies" xlink:href="cme-20140630.xsd#Contingencies" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/ContingenciesDetails" xlink:href="cme-20140630.xsd#ContingenciesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/Debt" xlink:href="cme-20140630.xsd#Debt" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/DebtDebtShortTermDebtDetails" xlink:href="cme-20140630.xsd#DebtDebtShortTermDebtDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/DebtFairValueOfFixedRateNotesDetails" xlink:href="cme-20140630.xsd#DebtFairValueOfFixedRateNotesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/DebtScheduleOfMaturitiesOfLongTermDebtDetails" xlink:href="cme-20140630.xsd#DebtScheduleOfMaturitiesOfLongTermDebtDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/DebtScheduleOfShortTermAndLongTermDebtDetails" xlink:href="cme-20140630.xsd#DebtScheduleOfShortTermAndLongTermDebtDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/DebtTables" xlink:href="cme-20140630.xsd#DebtTables" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/DocumentAndEntityInformation" xlink:href="cme-20140630.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/EarningsPerShare" xlink:href="cme-20140630.xsd#EarningsPerShare" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/EarningsPerShareAntiDilutiveSecuritiesDetails" xlink:href="cme-20140630.xsd#EarningsPerShareAntiDilutiveSecuritiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/EarningsPerShareNetIncomeAttributableToCmeGroupDetails" xlink:href="cme-20140630.xsd#EarningsPerShareNetIncomeAttributableToCmeGroupDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/EarningsPerShareTables" xlink:href="cme-20140630.xsd#EarningsPerShareTables" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/FairValueMeasurements" xlink:href="cme-20140630.xsd#FairValueMeasurements" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/FairValueMeasurementsFairValueMeasurementsNarrativeDetailDetails" xlink:href="cme-20140630.xsd#FairValueMeasurementsFairValueMeasurementsNarrativeDetailDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/FairValueMeasurementsFinancialInstrumentsMeasuredAtFairValueOnRecurringBasisDetails" xlink:href="cme-20140630.xsd#FairValueMeasurementsFinancialInstrumentsMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/FairValueMeasurementsReconciliationUsingSignificantUnobservableInputsDetails" xlink:href="cme-20140630.xsd#FairValueMeasurementsReconciliationUsingSignificantUnobservableInputsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/FairValueMeasurementsTables" xlink:href="cme-20140630.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/Guarantees" xlink:href="cme-20140630.xsd#Guarantees" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/GuaranteesDetails" xlink:href="cme-20140630.xsd#GuaranteesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwill" xlink:href="cme-20140630.xsd#IntangibleAssetsAndGoodwill" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwillComponentsOfIntangibleAssetsDetails" xlink:href="cme-20140630.xsd#IntangibleAssetsAndGoodwillComponentsOfIntangibleAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwillFutureEstimatedAmortizationExpenseDetails" xlink:href="cme-20140630.xsd#IntangibleAssetsAndGoodwillFutureEstimatedAmortizationExpenseDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwillNarrativeDetails" xlink:href="cme-20140630.xsd#IntangibleAssetsAndGoodwillNarrativeDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwillTables" xlink:href="cme-20140630.xsd#IntangibleAssetsAndGoodwillTables" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/PerformanceBondsAndGuarantyFundContributionsDetails" xlink:href="cme-20140630.xsd#PerformanceBondsAndGuarantyFundContributionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/PerformanceBondsAndGuarantyFundContributionsNotes" xlink:href="cme-20140630.xsd#PerformanceBondsAndGuarantyFundContributionsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/PerformanceBondsAndGuarantyFundContributionsTables" xlink:href="cme-20140630.xsd#PerformanceBondsAndGuarantyFundContributionsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/SubsequentEvents" xlink:href="cme-20140630.xsd#SubsequentEvents" xlink:type="simple" />
  <roleRef roleURI="http://www.cmegroup.com/role/SubsequentEventsSubsequentEventsDetails" xlink:href="cme-20140630.xsd#SubsequentEventsSubsequentEventsDetails" xlink:type="simple" />
  <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <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" />
  <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" />
  <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" />
  <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" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/AccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_A89D775FCA3674592B60A1AF22B65A64" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_StatementTable_A89D775FCA3674592B60A1AF22B65A64" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLocationAxis" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_142770744A060BB30C86A1AF22B74886" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_A89D775FCA3674592B60A1AF22B65A64" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_142770744A060BB30C86A1AF22B74886" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_85EB288A75B139645650A1B1565789B3_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_142770744A060BB30C86A1AF22B74886" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_85EB288A75B139645650A1B1565789B3_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_85EB288A75B139645650A1B1565789B3" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_142770744A060BB30C86A1AF22B74886" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_85EB288A75B139645650A1B1565789B3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_FCC6BB340C6B4F4DFD13A1B1565BB6F1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_85EB288A75B139645650A1B1565789B3" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_FCC6BB340C6B4F4DFD13A1B1565BB6F1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SecuritiesInvestmentMember" xlink:label="loc_us-gaap_SecuritiesInvestmentMember_D39E96ECB13E22B16E45A1B1565BCB80" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_85EB288A75B139645650A1B1565789B3" xlink:to="loc_us-gaap_SecuritiesInvestmentMember_D39E96ECB13E22B16E45A1B1565BCB80" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DerivativeFinancialInstrumentsAssetsMember" xlink:label="loc_us-gaap_DerivativeFinancialInstrumentsAssetsMember_C50EC5839070F5636598A1B1565C2FF9" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_85EB288A75B139645650A1B1565789B3" xlink:to="loc_us-gaap_DerivativeFinancialInstrumentsAssetsMember_C50EC5839070F5636598A1B1565C2FF9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_1B90D67DB028E8AEA91AA1B1565C1BBB" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_85EB288A75B139645650A1B1565789B3" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_1B90D67DB028E8AEA91AA1B1565C1BBB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_71B2D800762F8864877DA1B1565C67B1" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_85EB288A75B139645650A1B1565789B3" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_71B2D800762F8864877DA1B1565C67B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_5B350BF431950D41B434A1AF22B920D2" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_A89D775FCA3674592B60A1AF22B65A64" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_5B350BF431950D41B434A1AF22B920D2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_80DACC04724222191B97A1AF22B9C656_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5B350BF431950D41B434A1AF22B920D2" xlink:to="loc_us-gaap_EquityComponentDomain_80DACC04724222191B97A1AF22B9C656_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_80DACC04724222191B97A1AF22B9C656" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5B350BF431950D41B434A1AF22B920D2" xlink:to="loc_us-gaap_EquityComponentDomain_80DACC04724222191B97A1AF22B9C656" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_EC428B82C7AF49D0D11CA1AF22B9C837" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_80DACC04724222191B97A1AF22B9C656" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_EC428B82C7AF49D0D11CA1AF22B9C837" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SecuritiesInvestmentMember" xlink:label="loc_us-gaap_SecuritiesInvestmentMember_2C11A0F4DC452256DBEFA1AF22B9B60B" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_80DACC04724222191B97A1AF22B9C656" xlink:to="loc_us-gaap_SecuritiesInvestmentMember_2C11A0F4DC452256DBEFA1AF22B9B60B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DerivativeFinancialInstrumentsAssetsMember" xlink:label="loc_us-gaap_DerivativeFinancialInstrumentsAssetsMember_8B6D233AEA4F6BAE6887A1AF22B9B02D" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_80DACC04724222191B97A1AF22B9C656" xlink:to="loc_us-gaap_DerivativeFinancialInstrumentsAssetsMember_8B6D233AEA4F6BAE6887A1AF22B9B02D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_2FC6C658C5F428032439A1AF22B9C7E2" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_80DACC04724222191B97A1AF22B9C656" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_2FC6C658C5F428032439A1AF22B9C7E2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_6130DFDBDE4B74DC5365A1AF22B9CA2E" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_80DACC04724222191B97A1AF22B9C656" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_6130DFDBDE4B74DC5365A1AF22B9CA2E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_7F8578FEFEA3FD1C9BF6A1AF22B9EB31" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_7F8578FEFEA3FD1C9BF6A1AF22B9EB31" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_0820D7C9340ACBD3D671A1AF22B94673" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_StockholdersEquity_0820D7C9340ACBD3D671A1AF22B94673" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_FCE391EBE44060B26A9FA1AF22B97271" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_FCE391EBE44060B26A9FA1AF22B97271" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_1781EA62F77FBCA88E5AA1AF22B9BF7D" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_1781EA62F77FBCA88E5AA1AF22B9BF7D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_AD1303BCA57FE37852C2A1AF22BA4175" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_AD1303BCA57FE37852C2A1AF22BA4175" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_30FE6403EC2292C54928A1AF22BA3AE8" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_30FE6403EC2292C54928A1AF22BA3AE8" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_ComprehensiveIncomeBeforeReclassificationAdjustments" xlink:label="loc_cme_ComprehensiveIncomeBeforeReclassificationAdjustments_CBD98DFFD066FA2B8EAFA1AF22BADA1A" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_cme_ComprehensiveIncomeBeforeReclassificationAdjustments_CBD98DFFD066FA2B8EAFA1AF22BADA1A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_8842870C76C6BFA80768A1AF22BAB2D9" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_8842870C76C6BFA80768A1AF22BAB2D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_E6A6F664DE821EDA2D52A1AF22BA6DFC" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_E6A6F664DE821EDA2D52A1AF22BA6DFC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax_C5E2FDA449044911A6C0A1AF22BA9480" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax_C5E2FDA449044911A6C0A1AF22BA9480" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_ComprehensiveIncomeReclassificationAdjustments" xlink:label="loc_cme_ComprehensiveIncomeReclassificationAdjustments_A020E86E8A59F85B289CA1AF22BAC092" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_cme_ComprehensiveIncomeReclassificationAdjustments_A020E86E8A59F85B289CA1AF22BAC092" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_8E947B5AA6A5AB0364C0A1AF22BADF1A" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_8E947B5AA6A5AB0364C0A1AF22BADF1A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_035AE492ED450A36CC06A1AF22BAD433" xlink:type="locator" />
    <definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_035AE492ED450A36CC06A1AF22BAD433" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_C393C265B0C3997C4620A1AF22BAF843" xlink:type="locator" />
    <definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_C393C265B0C3997C4620A1AF22BAF843" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_F72F2F674E33214069CAA1AF22BA59DB" xlink:type="locator" />
    <definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_F72F2F674E33214069CAA1AF22BA59DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_359C4327F1266E046B37A1AF22BA2869" xlink:type="locator" />
    <definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_359C4327F1266E046B37A1AF22BA2869" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_286C0520FEA73D51376DA1AF22BA1B88" xlink:type="locator" />
    <definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C666B5CB98E57E7A503AA1AF22B9A1D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_286C0520FEA73D51376DA1AF22BA1B88" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/AccumulatedOtherComprehensiveIncomeNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/AccumulatedOtherComprehensiveIncomeTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/BasisOfPresentation" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1E0DA65655CB2FFAD0FFA16D9BF075ED" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_E740A03008CD10E6652AA16D9BEFB3FE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1E0DA65655CB2FFAD0FFA16D9BF075ED" xlink:to="loc_us-gaap_StatementTable_E740A03008CD10E6652AA16D9BEFB3FE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_1351CAE33AA3D429523BA16D9BEFBED9" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_E740A03008CD10E6652AA16D9BEFB3FE" xlink:to="loc_us-gaap_StatementClassOfStockAxis_1351CAE33AA3D429523BA16D9BEFBED9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_3BE3BEA3054AF2A99B41A16D9BEFF279_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1351CAE33AA3D429523BA16D9BEFBED9" xlink:to="loc_us-gaap_ClassOfStockDomain_3BE3BEA3054AF2A99B41A16D9BEFF279_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_3BE3BEA3054AF2A99B41A16D9BEFF279" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1351CAE33AA3D429523BA16D9BEFBED9" xlink:to="loc_us-gaap_ClassOfStockDomain_3BE3BEA3054AF2A99B41A16D9BEFF279" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_17FC75AE6F2C849ADBC6A16D9BEF22EE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3BE3BEA3054AF2A99B41A16D9BEFF279" xlink:to="loc_us-gaap_CommonClassAMember_17FC75AE6F2C849ADBC6A16D9BEF22EE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_CCD96A414958D1BD3C38A16D9BF08200" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3BE3BEA3054AF2A99B41A16D9BEFF279" xlink:to="loc_us-gaap_CommonClassBMember_CCD96A414958D1BD3C38A16D9BF08200" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1E0DA65655CB2FFAD0FFA16D9BF075ED" xlink:to="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_D5464AE65787066E2ABBA16D9BF0AE10" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_D5464AE65787066E2ABBA16D9BF0AE10" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesCurrent" xlink:label="loc_us-gaap_MarketableSecuritiesCurrent_12647482EAA50F7A0E2AA16D9BF05570" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_MarketableSecuritiesCurrent_12647482EAA50F7A0E2AA16D9BF05570" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_995E3F78CBB76B551031A16D9BF0700C" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_995E3F78CBB76B551031A16D9BF0700C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_3C0DCE88624147C69958A16D9BF0986F" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_OtherAssetsCurrent_3C0DCE88624147C69958A16D9BF0986F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodFaithAndMarginDepositsWithBrokerDealers" xlink:label="loc_us-gaap_GoodFaithAndMarginDepositsWithBrokerDealers_7B1CE5193D5AAAF3220CA16D9BF02AA5" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_GoodFaithAndMarginDepositsWithBrokerDealers_7B1CE5193D5AAAF3220CA16D9BF02AA5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_D128BCD442F226C92CF6A16D9BF07B5B" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_AssetsCurrent_D128BCD442F226C92CF6A16D9BF07B5B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_D43A7E2DD3F6B3991AAFA16D9BF099CA" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_D43A7E2DD3F6B3991AAFA16D9BF099CA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherIndefiniteLivedIntangibleAssets" xlink:label="loc_us-gaap_OtherIndefiniteLivedIntangibleAssets_9D047BA4D1C779F32583A16D9BF09E0A" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_OtherIndefiniteLivedIntangibleAssets_9D047BA4D1C779F32583A16D9BF09E0A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_A9BA7A20005725497AD4A16D9BF0DC58" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_A9BA7A20005725497AD4A16D9BF0DC58" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_0D5C36CD89328CCC5800A16D9BF089CA" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_Goodwill_0D5C36CD89328CCC5800A16D9BF089CA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_1FD183DFD2A753BDE1F8A16D9BF14FC4" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_1FD183DFD2A753BDE1F8A16D9BF14FC4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_7A00DF7150981C2F92CDA16D9BF11955" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_B4DC18F8FC156E635E5CA16D9BF02A15" xlink:to="loc_us-gaap_Assets_7A00DF7150981C2F92CDA16D9BF11955" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1E0DA65655CB2FFAD0FFA16D9BF075ED" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_70F754565067F17CB705A16D9BF129A9" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_AccountsPayableCurrent_70F754565067F17CB705A16D9BF129A9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_072DBE212EA58B908E9CA16D9BF11ECF" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_ShortTermBorrowings_072DBE212EA58B908E9CA16D9BF11ECF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_13CFF2FE9436B8D90FAEA16D9BF19217" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_13CFF2FE9436B8D90FAEA16D9BF19217" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_MarginDepositsAndGuarantyFundsLiabilitiesCurrent" xlink:label="loc_cme_MarginDepositsAndGuarantyFundsLiabilitiesCurrent_C33ABF5CE982A4760B6AA16D9BF1A917" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_cme_MarginDepositsAndGuarantyFundsLiabilitiesCurrent_C33ABF5CE982A4760B6AA16D9BF1A917" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_7601B13F2BE35EBE7DEBA16D9BF1040B" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_LiabilitiesCurrent_7601B13F2BE35EBE7DEBA16D9BF1040B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UnsecuredLongTermDebt" xlink:label="loc_us-gaap_UnsecuredLongTermDebt_CFDCC16DED911AC30D52A16D9BF1A703" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_UnsecuredLongTermDebt_CFDCC16DED911AC30D52A16D9BF1A703" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent_DBB4456744AE669CCDF4A16D9BF1CF5D" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent_DBB4456744AE669CCDF4A16D9BF1CF5D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_70D260268AF46CF0041DA16D9BF1A688" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_70D260268AF46CF0041DA16D9BF1A688" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_E4FB6BABD1A1DD9B84EFA16D9BF1AC77" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_Liabilities_E4FB6BABD1A1DD9B84EFA16D9BF1AC77" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_779C1C63937391DAF35CA16D9BF1C0B1" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_StockholdersEquityAbstract_779C1C63937391DAF35CA16D9BF1C0B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_265159A0D5770601F466A16D9BF12580" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_779C1C63937391DAF35CA16D9BF1C0B1" xlink:to="loc_us-gaap_PreferredStockValue_265159A0D5770601F466A16D9BF12580" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockValueOutstanding" xlink:label="loc_us-gaap_CommonStockValueOutstanding_BDF1DCC8B7B193B6C014A16D9BF2BD4C" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_779C1C63937391DAF35CA16D9BF1C0B1" xlink:to="loc_us-gaap_CommonStockValueOutstanding_BDF1DCC8B7B193B6C014A16D9BF2BD4C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_350D7EDEA012CF0E1DB4A16D9BF28922" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_779C1C63937391DAF35CA16D9BF1C0B1" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_350D7EDEA012CF0E1DB4A16D9BF28922" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_D55F42C8C952EBEA0AAFA16D9BF21535" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_779C1C63937391DAF35CA16D9BF1C0B1" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_D55F42C8C952EBEA0AAFA16D9BF21535" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_A70EE047A62E23F06031A16D9BF24600" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_779C1C63937391DAF35CA16D9BF1C0B1" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_A70EE047A62E23F06031A16D9BF24600" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_3AD826D71A333A0D41C5A16D9BF29D2C" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_779C1C63937391DAF35CA16D9BF1C0B1" xlink:to="loc_us-gaap_StockholdersEquity_3AD826D71A333A0D41C5A16D9BF29D2C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaap_MinorityInterest_FABED62E6AEA0BDE1A81A16D9BF27144" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_MinorityInterest_FABED62E6AEA0BDE1A81A16D9BF27144" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_D267D797405EAD7B08A8A16D9BF2261B" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_D267D797405EAD7B08A8A16D9BF2261B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_6F7994BF502E182DCB97A16D9BF25D3E" xlink:type="locator" />
    <definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4B9A2CB0FC10A9E5DA77A16D9BF18F88" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_6F7994BF502E182DCB97A16D9BF25D3E" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_868C6A206A5FC50F22C181D65D1A96CF" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_StatementTable_868C6A206A5FC50F22C181D65D1A96CF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_6C7D9279A243A99B6ED781D65D1AA37F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_868C6A206A5FC50F22C181D65D1A96CF" xlink:to="loc_us-gaap_StatementClassOfStockAxis_6C7D9279A243A99B6ED781D65D1AA37F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_34FC539F1140359CBD9581D65D1A1CD8_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6C7D9279A243A99B6ED781D65D1AA37F" xlink:to="loc_us-gaap_ClassOfStockDomain_34FC539F1140359CBD9581D65D1A1CD8_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_34FC539F1140359CBD9581D65D1A1CD8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6C7D9279A243A99B6ED781D65D1AA37F" xlink:to="loc_us-gaap_ClassOfStockDomain_34FC539F1140359CBD9581D65D1A1CD8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_65B18FDA3931B89CF52381D65D1A014C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_34FC539F1140359CBD9581D65D1A1CD8" xlink:to="loc_us-gaap_PreferredStockMember_65B18FDA3931B89CF52381D65D1A014C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SeriesAPreferredStockMember" xlink:label="loc_us-gaap_SeriesAPreferredStockMember_8AB933F11FB89E1C061B81D65D1AD01D" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_34FC539F1140359CBD9581D65D1A1CD8" xlink:to="loc_us-gaap_SeriesAPreferredStockMember_8AB933F11FB89E1C061B81D65D1AD01D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_BEE317D2ED3176C9025681D65D1A0A39" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_34FC539F1140359CBD9581D65D1A1CD8" xlink:to="loc_us-gaap_CommonClassAMember_BEE317D2ED3176C9025681D65D1A0A39" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_14915F6A71F70EB597D481D65D1A9519" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_34FC539F1140359CBD9581D65D1A1CD8" xlink:to="loc_us-gaap_CommonClassBMember_14915F6A71F70EB597D481D65D1A9519" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_D0DE71029DDCD53367D281D65D1ACA35" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_D0DE71029DDCD53367D281D65D1ACA35" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_62EF127583F7FB99786181D65D1A7AE5" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_62EF127583F7FB99786181D65D1A7AE5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_611A0DF2F817A541DBB981D65D1AC6AB" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_611A0DF2F817A541DBB981D65D1AC6AB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsNoncurrent" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_A50E35A7C6006609EB8881D65D1A0C7E" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_A50E35A7C6006609EB8881D65D1A0C7E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_B03F1B2438B8F9CDC00481D65D1A5499" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_B03F1B2438B8F9CDC00481D65D1A5499" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_ABEBB7B197FECEA8431981D65D1A9381" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_ABEBB7B197FECEA8431981D65D1A9381" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_13823A519876BEA6143F81D65D1AE515" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_PreferredStockSharesIssued_13823A519876BEA6143F81D65D1AE515" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_E87964DACC420BAA74BB81D65D1AD39B" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_E87964DACC420BAA74BB81D65D1AD39B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_5DE6D2CF5F384B7085A381D65D1A1D0E" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_5DE6D2CF5F384B7085A381D65D1A1D0E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_0F930BE5FBEB6721B81481D65D1A488E" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_0F930BE5FBEB6721B81481D65D1A488E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_61EB382AD830E1DD14DE81D65D1A3483" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_CommonStockSharesIssued_61EB382AD830E1DD14DE81D65D1A3483" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_163261559771A7B8531281D65D1A25C6" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BCB7D73FFBC3AD45809281D65D1A5A7A" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_163261559771A7B8531281D65D1A25C6" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_C9ABB95D1DECFAF800D59329CCD6196A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_13C2295CB6AE081DA3CD9329CCD686E4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_C9ABB95D1DECFAF800D59329CCD6196A" xlink:to="loc_us-gaap_StatementTable_13C2295CB6AE081DA3CD9329CCD686E4" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_1AD0B0255BF02FF2A2659329CCD69F20" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_13C2295CB6AE081DA3CD9329CCD686E4" xlink:to="loc_us-gaap_StatementScenarioAxis_1AD0B0255BF02FF2A2659329CCD69F20" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_E4213A0A6F81C782068D9329CCD6FFD8_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_1AD0B0255BF02FF2A2659329CCD69F20" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_E4213A0A6F81C782068D9329CCD6FFD8_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_E4213A0A6F81C782068D9329CCD6FFD8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_1AD0B0255BF02FF2A2659329CCD69F20" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_E4213A0A6F81C782068D9329CCD6FFD8" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/ConsolidatedStatementsOfIncome" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_51127134BA4CB016B1AC8360AEA08BC2" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_0B8B438BAD5864E7DBB88360AE9F3CF3" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_51127134BA4CB016B1AC8360AEA08BC2" xlink:to="loc_us-gaap_StatementTable_0B8B438BAD5864E7DBB88360AE9F3CF3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_00498C8184B64C5ECE4D8360AE9F059D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_0B8B438BAD5864E7DBB88360AE9F3CF3" xlink:to="loc_us-gaap_StatementScenarioAxis_00498C8184B64C5ECE4D8360AE9F059D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_952A9133480FE35736168360AE9F6D80_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_00498C8184B64C5ECE4D8360AE9F059D" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_952A9133480FE35736168360AE9F6D80_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_952A9133480FE35736168360AE9F6D80" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_00498C8184B64C5ECE4D8360AE9F059D" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_952A9133480FE35736168360AE9F6D80" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/ConsolidatedStatementsOfShareholdersEquity" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_401F77F6757163939F498D20671CD474" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StatementTable_401F77F6757163939F498D20671CD474" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_0FB90BFEFBCF440E241F8D20671C3263" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_401F77F6757163939F498D20671CD474" xlink:to="loc_us-gaap_StatementClassOfStockAxis_0FB90BFEFBCF440E241F8D20671C3263" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_D017218A28725E7EDEE98D20671C1641_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_0FB90BFEFBCF440E241F8D20671C3263" xlink:to="loc_us-gaap_ClassOfStockDomain_D017218A28725E7EDEE98D20671C1641_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_D017218A28725E7EDEE98D20671C1641" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_0FB90BFEFBCF440E241F8D20671C3263" xlink:to="loc_us-gaap_ClassOfStockDomain_D017218A28725E7EDEE98D20671C1641" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_DD3C6EC3E8DF139C49B68D20671CB4E4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_D017218A28725E7EDEE98D20671C1641" xlink:to="loc_us-gaap_CommonClassAMember_DD3C6EC3E8DF139C49B68D20671CB4E4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_8D605223C54BC03266B88D20671CDB63" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_D017218A28725E7EDEE98D20671C1641" xlink:to="loc_us-gaap_CommonClassBMember_8D605223C54BC03266B88D20671CDB63" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_3961BF5DB491B560D7398D20671C689E" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_401F77F6757163939F498D20671CD474" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_3961BF5DB491B560D7398D20671C689E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_D91F259F0DE0BFF63C478D20671C8BAF_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3961BF5DB491B560D7398D20671C689E" xlink:to="loc_us-gaap_EquityComponentDomain_D91F259F0DE0BFF63C478D20671C8BAF_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_D91F259F0DE0BFF63C478D20671C8BAF" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3961BF5DB491B560D7398D20671C689E" xlink:to="loc_us-gaap_EquityComponentDomain_D91F259F0DE0BFF63C478D20671C8BAF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_3B90CD80DF57637616308D20671C7899" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_D91F259F0DE0BFF63C478D20671C8BAF" xlink:to="loc_us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_3B90CD80DF57637616308D20671C7899" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_9F0E46DE78084753070F8D20671CC3BA" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_D91F259F0DE0BFF63C478D20671C8BAF" xlink:to="loc_us-gaap_RetainedEarningsMember_9F0E46DE78084753070F8D20671CC3BA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_AE47C470F9B91503E7D58D20671C94F1" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_D91F259F0DE0BFF63C478D20671C8BAF" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_AE47C470F9B91503E7D58D20671C94F1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ParentMember" xlink:label="loc_us-gaap_ParentMember_C49938586AF1537CF2EE8D20671C10B2" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_D91F259F0DE0BFF63C478D20671C8BAF" xlink:to="loc_us-gaap_ParentMember_C49938586AF1537CF2EE8D20671C10B2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_D409733CFA0AAE070CF88D20671C3E5E" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_D91F259F0DE0BFF63C478D20671C8BAF" xlink:to="loc_us-gaap_NoncontrollingInterestMember_D409733CFA0AAE070CF88D20671C3E5E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_E848775763142B097FDC8D20671C7A7F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_E848775763142B097FDC8D20671C7A7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_29D3F5F9906A1120D53A8D20671C88C7" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_29D3F5F9906A1120D53A8D20671C88C7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_BD0DA9AD893C950BE99F8D20671CEDD7" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_BD0DA9AD893C950BE99F8D20671CEDD7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A6DA8223E1102ED2A81C8D20671C0A23" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A6DA8223E1102ED2A81C8D20671C0A23" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_D16F0AD50946046E2E568D20671C5445" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_D16F0AD50946046E2E568D20671C5445" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_C82973F48EF482E722B88D20671C86F9" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StockholdersEquity_C82973F48EF482E722B88D20671C86F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_C6ADF0249A1DE980F76B8D20671CCA81" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_NetIncomeLoss_C6ADF0249A1DE980F76B8D20671CCA81" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_9DD100F912C64C994EC58D20671C046D" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_9DD100F912C64C994EC58D20671C046D" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_NetIncomeIncludingPortionAttributableToNonredeemableNonControllingInterest" xlink:label="loc_cme_NetIncomeIncludingPortionAttributableToNonredeemableNonControllingInterest_6B976DA0B767A2B24BB68D20671C85E2" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_cme_NetIncomeIncludingPortionAttributableToNonredeemableNonControllingInterest_6B976DA0B767A2B24BB68D20671C85E2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_EC795258B3B5E0E84A898D20671C2701" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_EC795258B3B5E0E84A898D20671C2701" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_PurchaseofNoncontrollinginterestcostbasis" xlink:label="loc_cme_PurchaseofNoncontrollinginterestcostbasis_3F077E50C50D993D07E88D6E6D7011C6" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_cme_PurchaseofNoncontrollinginterestcostbasis_3F077E50C50D993D07E88D6E6D7011C6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DividendsCash" xlink:label="loc_us-gaap_DividendsCash_66B58886AE08F540F65C8D20671CE448" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_DividendsCash_66B58886AE08F540F65C8D20671CE448" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_E4C73DAD840BE43206788D20671CC3FB" xlink:type="locator" />
    <definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_E4C73DAD840BE43206788D20671CC3FB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_E5DC29B86D15257553FE8D20671C1A23" xlink:type="locator" />
    <definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_E5DC29B86D15257553FE8D20671C1A23" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_D1DCBDF50EA2DC64B69C8D20671C309F" xlink:type="locator" />
    <definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_D1DCBDF50EA2DC64B69C8D20671C309F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_604752AED115712D18A68D20671CB728" xlink:type="locator" />
    <definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_604752AED115712D18A68D20671CB728" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_275D701423DC8E63FC8E8D20672C9F40" xlink:type="locator" />
    <definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_275D701423DC8E63FC8E8D20672C9F40" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross" xlink:label="loc_us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross_A978E7555FA6F903D6A88D20672C7C42" xlink:type="locator" />
    <definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross_A978E7555FA6F903D6A88D20672C7C42" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalOther" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_EE93811E8D936FB3C66A8D20672CBDC1" xlink:type="locator" />
    <definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_EE93811E8D936FB3C66A8D20672CBDC1" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_StockIssuedToRelatedPartiesDuringPeriodShares" xlink:label="loc_cme_StockIssuedToRelatedPartiesDuringPeriodShares_5F22FADA4EEC94C2B1588D20672CCA52" xlink:type="locator" />
    <definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_cme_StockIssuedToRelatedPartiesDuringPeriodShares_5F22FADA4EEC94C2B1588D20672CCA52" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_StockIssuedToRelatedPartiesDuringPeriodValue" xlink:label="loc_cme_StockIssuedToRelatedPartiesDuringPeriodValue_CE7C1B766B8A9DDA92A28D20672C68E0" xlink:type="locator" />
    <definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_CC863A0E0C352D457F9F8D20671CDA4F" xlink:to="loc_cme_StockIssuedToRelatedPartiesDuringPeriodValue_CE7C1B766B8A9DDA92A28D20672C68E0" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/ConsolidatedStatementsOfShareholdersEquityParenthetical" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/Contingencies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/ContingenciesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_E1B52035EA7DAFF2505D81D65CD41CDC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="loc_us-gaap_LossContingenciesTable_0839F12C62194F768A5281D65CD4181F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_E1B52035EA7DAFF2505D81D65CD41CDC" xlink:to="loc_us-gaap_LossContingenciesTable_0839F12C62194F768A5281D65CD4181F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_5DA541D1742DB7D520E781D65CD4A67C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_0839F12C62194F768A5281D65CD4181F" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_5DA541D1742DB7D520E781D65CD4A67C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_0952C6FC870DC2ADBF9E81D65CD4E413_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_5DA541D1742DB7D520E781D65CD4A67C" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_0952C6FC870DC2ADBF9E81D65CD4E413_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_0952C6FC870DC2ADBF9E81D65CD4E413" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_5DA541D1742DB7D520E781D65CD4A67C" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_0952C6FC870DC2ADBF9E81D65CD4E413" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_MFGlobalMember" xlink:label="loc_cme_MFGlobalMember_8BD1CC084747EB584F3A81D65CD4A3C4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_0952C6FC870DC2ADBF9E81D65CD4E413" xlink:to="loc_cme_MFGlobalMember_8BD1CC084747EB584F3A81D65CD4A3C4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BankruptcyClaimsAmountOfClaimsSettled" xlink:label="loc_us-gaap_BankruptcyClaimsAmountOfClaimsSettled_2345D77D4767D932307581D65CD4405D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E1B52035EA7DAFF2505D81D65CD41CDC" xlink:to="loc_us-gaap_BankruptcyClaimsAmountOfClaimsSettled_2345D77D4767D932307581D65CD4405D" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_BankruptcySettlementReturnedtoCustomers" xlink:label="loc_cme_BankruptcySettlementReturnedtoCustomers_40A596689EFFF20EA11381D65CD4B47F" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E1B52035EA7DAFF2505D81D65CD41CDC" xlink:to="loc_cme_BankruptcySettlementReturnedtoCustomers_40A596689EFFF20EA11381D65CD4B47F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LitigationReserve" xlink:label="loc_us-gaap_LitigationReserve_44246247263EB7EAC6D981D65CD45873" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E1B52035EA7DAFF2505D81D65CD41CDC" xlink:to="loc_us-gaap_LitigationReserve_44246247263EB7EAC6D981D65CD45873" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:label="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_123A99601DC9372B89A981D65CD45049" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E1B52035EA7DAFF2505D81D65CD41CDC" xlink:to="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_123A99601DC9372B89A981D65CD45049" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/Debt" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/DebtDebtShortTermDebtDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="loc_us-gaap_ShortTermDebtLineItems_B5139912B4E2711C496681D65C70F936" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_A2E4FC23E00464F7F43581D65C70CAB5" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_B5139912B4E2711C496681D65C70F936" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_A2E4FC23E00464F7F43581D65C70CAB5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_5437E9D76998C73A048781D65C70DD77" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_A2E4FC23E00464F7F43581D65C70CAB5" xlink:to="loc_us-gaap_DebtInstrumentAxis_5437E9D76998C73A048781D65C70DD77" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_262B776335DEEC663A9A81D65C7035CA_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_5437E9D76998C73A048781D65C70DD77" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_262B776335DEEC663A9A81D65C7035CA_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_262B776335DEEC663A9A81D65C7035CA" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_5437E9D76998C73A048781D65C70DD77" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_262B776335DEEC663A9A81D65C7035CA" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember" xlink:label="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember_6B03FC888027EFB8CFD981D65C70EC40" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_262B776335DEEC663A9A81D65C7035CA" xlink:to="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember_6B03FC888027EFB8CFD981D65C70EC40" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SevenHundredFiftyMillionDollarFixedRateNotesDueFebruaryTwentyFourteenInterestEqualToFivePointSevenFivePercentMember" xlink:label="loc_cme_SevenHundredFiftyMillionDollarFixedRateNotesDueFebruaryTwentyFourteenInterestEqualToFivePointSevenFivePercentMember_7A171EA529EC6CBA2C4081D65C703F2D" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_262B776335DEEC663A9A81D65C7035CA" xlink:to="loc_cme_SevenHundredFiftyMillionDollarFixedRateNotesDueFebruaryTwentyFourteenInterestEqualToFivePointSevenFivePercentMember_7A171EA529EC6CBA2C4081D65C703F2D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_0C6ACE9CF20BE01159AA81D65C707262" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_B5139912B4E2711C496681D65C70F936" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_0C6ACE9CF20BE01159AA81D65C707262" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_44D7E40CF390CF9DC2D981D65C700199" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_B5139912B4E2711C496681D65C70F936" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_44D7E40CF390CF9DC2D981D65C700199" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_F2A6C1914ACDDE91342681D65C70AAB7" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_B5139912B4E2711C496681D65C70F936" xlink:to="loc_us-gaap_ShortTermBorrowings_F2A6C1914ACDDE91342681D65C70AAB7" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/DebtFairValueOfFixedRateNotesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_BCE86B6772C90D146EFB81D65D1AE7DF" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_59B340A06B8F364E7DCF81D65D1A19CB" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_BCE86B6772C90D146EFB81D65D1AE7DF" xlink:to="loc_us-gaap_StatementTable_59B340A06B8F364E7DCF81D65D1A19CB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_8460D1F3DC3609151AC481D65D1A94AE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_59B340A06B8F364E7DCF81D65D1A19CB" xlink:to="loc_us-gaap_DebtInstrumentAxis_8460D1F3DC3609151AC481D65D1A94AE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_64C6032225F48D1B8DEB81D65D1A13AF_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_8460D1F3DC3609151AC481D65D1A94AE" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_64C6032225F48D1B8DEB81D65D1A13AF_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_64C6032225F48D1B8DEB81D65D1A13AF" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_8460D1F3DC3609151AC481D65D1A94AE" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_64C6032225F48D1B8DEB81D65D1A13AF" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SevenHundredFiftyMillionDollarFixedRateNotesDueFebruaryTwentyFourteenInterestEqualToFivePointSevenFivePercentMember" xlink:label="loc_cme_SevenHundredFiftyMillionDollarFixedRateNotesDueFebruaryTwentyFourteenInterestEqualToFivePointSevenFivePercentMember_9C09DA5A9B5CF9094EF481D65D1A8D6C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_64C6032225F48D1B8DEB81D65D1A13AF" xlink:to="loc_cme_SevenHundredFiftyMillionDollarFixedRateNotesDueFebruaryTwentyFourteenInterestEqualToFivePointSevenFivePercentMember_9C09DA5A9B5CF9094EF481D65D1A8D6C" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SixHundredTwelvePointFiveMillionFixedRateNotesDueMarchTwoThousandEighteenInterestEqualToFourPointFourZeroPercentMember" xlink:label="loc_cme_SixHundredTwelvePointFiveMillionFixedRateNotesDueMarchTwoThousandEighteenInterestEqualToFourPointFourZeroPercentMember_FEBAE5FFE2A78170684381D65D1A1287" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_64C6032225F48D1B8DEB81D65D1A13AF" xlink:to="loc_cme_SixHundredTwelvePointFiveMillionFixedRateNotesDueMarchTwoThousandEighteenInterestEqualToFourPointFourZeroPercentMember_FEBAE5FFE2A78170684381D65D1A1287" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandTwentyTwoInterestEqualToThreePointZeroPercentMemberMember" xlink:label="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandTwentyTwoInterestEqualToThreePointZeroPercentMemberMember_64C6AD6FF65D35447F8381D65D1A533D" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_64C6032225F48D1B8DEB81D65D1A13AF" xlink:to="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandTwentyTwoInterestEqualToThreePointZeroPercentMemberMember_64C6AD6FF65D35447F8381D65D1A533D" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember" xlink:label="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember_C2BC350C01BDEE98B81081D65D1A5D5F" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_64C6032225F48D1B8DEB81D65D1A13AF" xlink:to="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember_C2BC350C01BDEE98B81081D65D1A5D5F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="loc_us-gaap_DebtInstrumentFairValue_A2A9CFF7A317A30835FD81D65D1A7DEA" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_BCE86B6772C90D146EFB81D65D1AE7DF" xlink:to="loc_us-gaap_DebtInstrumentFairValue_A2A9CFF7A317A30835FD81D65D1A7DEA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_9BA1CAFD91E63628475981D65D1A82FD" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_BCE86B6772C90D146EFB81D65D1AE7DF" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_9BA1CAFD91E63628475981D65D1A82FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaap_DebtInstrumentMaturityDate_9CF879496438B6754CED81D65D1A7E62" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_BCE86B6772C90D146EFB81D65D1AE7DF" xlink:to="loc_us-gaap_DebtInstrumentMaturityDate_9CF879496438B6754CED81D65D1A7E62" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/DebtScheduleOfMaturitiesOfLongTermDebtDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/DebtScheduleOfShortTermAndLongTermDebtDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_472AAD03A1A6DBCFE9BD8D2F2AAC0937" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_443EA2F5730B8DCF67728D2F2AAC1A3E" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472AAD03A1A6DBCFE9BD8D2F2AAC0937" xlink:to="loc_us-gaap_StatementTable_443EA2F5730B8DCF67728D2F2AAC1A3E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_E4C914884B628A1BBAC58D2F2AAC1A95" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_443EA2F5730B8DCF67728D2F2AAC1A3E" xlink:to="loc_us-gaap_DebtInstrumentAxis_E4C914884B628A1BBAC58D2F2AAC1A95" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9B7502DE480D2C26D9A78D2F2AACE28A_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_E4C914884B628A1BBAC58D2F2AAC1A95" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9B7502DE480D2C26D9A78D2F2AACE28A_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9B7502DE480D2C26D9A78D2F2AACE28A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_E4C914884B628A1BBAC58D2F2AAC1A95" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9B7502DE480D2C26D9A78D2F2AACE28A" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SevenHundredFiftyMillionDollarFixedRateNotesDueFebruaryTwentyFourteenInterestEqualToFivePointSevenFivePercentMember" xlink:label="loc_cme_SevenHundredFiftyMillionDollarFixedRateNotesDueFebruaryTwentyFourteenInterestEqualToFivePointSevenFivePercentMember_DEFE5965A9449DBB36748D2F2AACF1E2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9B7502DE480D2C26D9A78D2F2AACE28A" xlink:to="loc_cme_SevenHundredFiftyMillionDollarFixedRateNotesDueFebruaryTwentyFourteenInterestEqualToFivePointSevenFivePercentMember_DEFE5965A9449DBB36748D2F2AACF1E2" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SixHundredTwelvePointFiveMillionFixedRateNotesDueMarchTwoThousandEighteenInterestEqualToFourPointFourZeroPercentMember" xlink:label="loc_cme_SixHundredTwelvePointFiveMillionFixedRateNotesDueMarchTwoThousandEighteenInterestEqualToFourPointFourZeroPercentMember_0C326FBEF8FC7628ACF68D2F2AACBAE2" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9B7502DE480D2C26D9A78D2F2AACE28A" xlink:to="loc_cme_SixHundredTwelvePointFiveMillionFixedRateNotesDueMarchTwoThousandEighteenInterestEqualToFourPointFourZeroPercentMember_0C326FBEF8FC7628ACF68D2F2AACBAE2" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandTwentyTwoInterestEqualToThreePointZeroPercentMemberMember" xlink:label="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandTwentyTwoInterestEqualToThreePointZeroPercentMemberMember_5DE748CD322569D3ABBD8D2F2AAC5550" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9B7502DE480D2C26D9A78D2F2AACE28A" xlink:to="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandTwentyTwoInterestEqualToThreePointZeroPercentMemberMember_5DE748CD322569D3ABBD8D2F2AAC5550" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember" xlink:label="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember_1FDD6CB8DBC23C39FFF08D2F2AAC14FD" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9B7502DE480D2C26D9A78D2F2AACE28A" xlink:to="loc_cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember_1FDD6CB8DBC23C39FFF08D2F2AAC14FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_E5BD3C301ACF26E01FD68D2F2AACCD02" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472AAD03A1A6DBCFE9BD8D2F2AAC0937" xlink:to="loc_us-gaap_ShortTermBorrowings_E5BD3C301ACF26E01FD68D2F2AACCD02" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UnsecuredLongTermDebt" xlink:label="loc_us-gaap_UnsecuredLongTermDebt_2A25FB8096BB6357C46B8D2F2F0F36B6" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472AAD03A1A6DBCFE9BD8D2F2AAC0937" xlink:to="loc_us-gaap_UnsecuredLongTermDebt_2A25FB8096BB6357C46B8D2F2F0F36B6" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_ForwardStartingInterestRateSwapAgreementFixedRate" xlink:label="loc_cme_ForwardStartingInterestRateSwapAgreementFixedRate_BF708D821609C9BD77878D2F2AAC99A5" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472AAD03A1A6DBCFE9BD8D2F2AAC0937" xlink:to="loc_cme_ForwardStartingInterestRateSwapAgreementFixedRate_BF708D821609C9BD77878D2F2AAC99A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_9732EBBF5A328BA8EA0D8D2F2AACFE42" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472AAD03A1A6DBCFE9BD8D2F2AAC0937" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_9732EBBF5A328BA8EA0D8D2F2AACFE42" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaap_DebtInstrumentMaturityDate_B1521B54D734E27C22418D2F2AACF6BA" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472AAD03A1A6DBCFE9BD8D2F2AAC0937" xlink:to="loc_us-gaap_DebtInstrumentMaturityDate_B1521B54D734E27C22418D2F2AACF6BA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_192266236BB12D88D13A8D2F2AAC43A9" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472AAD03A1A6DBCFE9BD8D2F2AAC0937" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_192266236BB12D88D13A8D2F2AAC43A9" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/DebtTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1C9C63B63E7794A49E9181D65CF2808D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_us-gaap_StatementTable_1C9C63B63E7794A49E9181D65CF2808D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_90512E1382C3479FBE1B81D65CF27410" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1C9C63B63E7794A49E9181D65CF2808D" xlink:to="loc_us-gaap_StatementClassOfStockAxis_90512E1382C3479FBE1B81D65CF27410" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_9DB9DC1D39DEA3E8EE0881D65CF26ED8_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_90512E1382C3479FBE1B81D65CF27410" xlink:to="loc_us-gaap_ClassOfStockDomain_9DB9DC1D39DEA3E8EE0881D65CF26ED8_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_9DB9DC1D39DEA3E8EE0881D65CF26ED8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_90512E1382C3479FBE1B81D65CF27410" xlink:to="loc_us-gaap_ClassOfStockDomain_9DB9DC1D39DEA3E8EE0881D65CF26ED8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_30F0C9471B50194A779E81D65CF2BCF6" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9DB9DC1D39DEA3E8EE0881D65CF26ED8" xlink:to="loc_us-gaap_CommonClassAMember_30F0C9471B50194A779E81D65CF2BCF6" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_ClassBCommonStockClassB1Member" xlink:label="loc_cme_ClassBCommonStockClassB1Member_60D6E9A0CDE717717CE681D65CF25888" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9DB9DC1D39DEA3E8EE0881D65CF26ED8" xlink:to="loc_cme_ClassBCommonStockClassB1Member_60D6E9A0CDE717717CE681D65CF25888" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_ClassBCommonStockClassB2Member" xlink:label="loc_cme_ClassBCommonStockClassB2Member_0E0989E5D62B0C0ED88681D65CF27DF3" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9DB9DC1D39DEA3E8EE0881D65CF26ED8" xlink:to="loc_cme_ClassBCommonStockClassB2Member_0E0989E5D62B0C0ED88681D65CF27DF3" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_ClassBCommonStockClassB3Member" xlink:label="loc_cme_ClassBCommonStockClassB3Member_0747A0D6880F65C7B28881D65CF2B96D" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9DB9DC1D39DEA3E8EE0881D65CF26ED8" xlink:to="loc_cme_ClassBCommonStockClassB3Member_0747A0D6880F65C7B28881D65CF2B96D" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_ClassBCommonStockClassB4Member" xlink:label="loc_cme_ClassBCommonStockClassB4Member_E66AD659DDAA2E97660F81D65CF27F99" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9DB9DC1D39DEA3E8EE0881D65CF26ED8" xlink:to="loc_cme_ClassBCommonStockClassB4Member_E66AD659DDAA2E97660F81D65CF27F99" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_686AA64A8A67B5869E6D81D65CF218AC" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_DocumentType_686AA64A8A67B5869E6D81D65CF218AC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_0F720FAFEF7B74CE2A0281D65CF23AFE" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_AmendmentFlag_0F720FAFEF7B74CE2A0281D65CF23AFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_ADA376A3F8C475F8546881D65CF2DF5E" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_DocumentPeriodEndDate_ADA376A3F8C475F8546881D65CF2DF5E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_46176E4F381197CB127181D65CF28A3B" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_DocumentFiscalPeriodFocus_46176E4F381197CB127181D65CF28A3B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_D011EA62906AEB1C962E81D65CF25C6E" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_DocumentFiscalYearFocus_D011EA62906AEB1C962E81D65CF25C6E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_B08C40A7DCD68A4FD5EE81D65CF2A6DF" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_EntityRegistrantName_B08C40A7DCD68A4FD5EE81D65CF2A6DF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_DEB2A093BDD7B1C78EFD81D65CF28F39" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_EntityCentralIndexKey_DEB2A093BDD7B1C78EFD81D65CF28F39" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_D1B057DC22A1E34A387D81D65CF2FC4C" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_CurrentFiscalYearEndDate_D1B057DC22A1E34A387D81D65CF2FC4C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_E5675FF6A2FC8418DB9081D65CF2F360" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_EntityFilerCategory_E5675FF6A2FC8418DB9081D65CF2F360" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_114161CF0BCB337B637181D65CF245DC" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_F6B39D763547A578E7B481D65CF28800" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_114161CF0BCB337B637181D65CF245DC" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/EarningsPerShare" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/EarningsPerShareAntiDilutiveSecuritiesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_18E9ED07098327A3750781D65CB6866D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_2DBEDEE2FA206169C55281D65CB68F42" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_18E9ED07098327A3750781D65CB6866D" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_2DBEDEE2FA206169C55281D65CB68F42" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_59EAEC2C44EA4F9CB81C81D65CB62B6F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_2DBEDEE2FA206169C55281D65CB68F42" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_59EAEC2C44EA4F9CB81C81D65CB62B6F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E07EEF32021C01BD189481D65CB64FBA_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_59EAEC2C44EA4F9CB81C81D65CB62B6F" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E07EEF32021C01BD189481D65CB64FBA_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E07EEF32021C01BD189481D65CB64FBA" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_59EAEC2C44EA4F9CB81C81D65CB62B6F" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E07EEF32021C01BD189481D65CB64FBA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_EB23A10C8CC044EF4E8881D65CB6CC8B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E07EEF32021C01BD189481D65CB64FBA" xlink:to="loc_us-gaap_EmployeeStockOptionMember_EB23A10C8CC044EF4E8881D65CB6CC8B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_BBA9780C3CED884987D381D65CB65116" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E07EEF32021C01BD189481D65CB64FBA" xlink:to="loc_us-gaap_RestrictedStockMember_BBA9780C3CED884987D381D65CB65116" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1419CCF844C1F1E1309881D65CB657D8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_18E9ED07098327A3750781D65CB6866D" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1419CCF844C1F1E1309881D65CB657D8" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/EarningsPerShareNetIncomeAttributableToCmeGroupDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD9B5981648A5D56B46581D65CDE3C06" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C8B11575F1D284352C6481D65CDE6229" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD9B5981648A5D56B46581D65CDE3C06" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C8B11575F1D284352C6481D65CDE6229" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_6FE577D8EC57F6BBBE5281D65CDEBAD7" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C8B11575F1D284352C6481D65CDE6229" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_6FE577D8EC57F6BBBE5281D65CDEBAD7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_55A206A7969ECADA0CEE81D65CDE1562_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_6FE577D8EC57F6BBBE5281D65CDEBAD7" xlink:to="loc_us-gaap_EquityComponentDomain_55A206A7969ECADA0CEE81D65CDE1562_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_55A206A7969ECADA0CEE81D65CDE1562" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_6FE577D8EC57F6BBBE5281D65CDEBAD7" xlink:to="loc_us-gaap_EquityComponentDomain_55A206A7969ECADA0CEE81D65CDE1562" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_1FDBA8B1984EE26CC7AF81D65CDE2D6C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_55A206A7969ECADA0CEE81D65CDE1562" xlink:to="loc_us-gaap_RetainedEarningsMember_1FDBA8B1984EE26CC7AF81D65CDE2D6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_5C392840631D21BF86E781D65CDEC0D2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD9B5981648A5D56B46581D65CDE3C06" xlink:to="loc_us-gaap_NetIncomeLoss_5C392840631D21BF86E781D65CDEC0D2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_EAD9C477E26A061D688481D65CDE0B5B" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD9B5981648A5D56B46581D65CDE3C06" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_EAD9C477E26A061D688481D65CDE0B5B" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_DilutiveSecuritiesEffectOnEps" xlink:label="loc_cme_DilutiveSecuritiesEffectOnEps_A21A5756FE7AC993BD5581D65CDEB792" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD9B5981648A5D56B46581D65CDE3C06" xlink:to="loc_cme_DilutiveSecuritiesEffectOnEps_A21A5756FE7AC993BD5581D65CDEB792" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_3FC8210184EFD3D6774D81D65CDEFF57" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD9B5981648A5D56B46581D65CDE3C06" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_3FC8210184EFD3D6774D81D65CDEFF57" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_E7411660786B6CB86A7581D65CDED66D" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD9B5981648A5D56B46581D65CDE3C06" xlink:to="loc_us-gaap_EarningsPerShareBasic_E7411660786B6CB86A7581D65CDED66D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_274B6D97248DE6A1173181D65CDE60AE" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD9B5981648A5D56B46581D65CDE3C06" xlink:to="loc_us-gaap_EarningsPerShareDiluted_274B6D97248DE6A1173181D65CDE60AE" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/EarningsPerShareTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/FairValueMeasurements" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/FairValueMeasurementsFairValueMeasurementsNarrativeDetailDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/FairValueMeasurementsFinancialInstrumentsMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D331278054B83F6D016C9329895F23C3" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D331278054B83F6D016C9329895F23C3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2A324F4ECEC7DBC73BB79329895F8903" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D331278054B83F6D016C9329895F23C3" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2A324F4ECEC7DBC73BB79329895F8903" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_6C4A262AE3F6E5BD90A89329895FA6B4_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2A324F4ECEC7DBC73BB79329895F8903" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_6C4A262AE3F6E5BD90A89329895FA6B4_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_6C4A262AE3F6E5BD90A89329895FA6B4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2A324F4ECEC7DBC73BB79329895F8903" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_6C4A262AE3F6E5BD90A89329895FA6B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_9FAB95486EA9F4816D1C9329895F1C2B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_6C4A262AE3F6E5BD90A89329895FA6B4" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_9FAB95486EA9F4816D1C9329895F1C2B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_994B8E70FD77A182965F9329895F031F" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D331278054B83F6D016C9329895F23C3" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_994B8E70FD77A182965F9329895F031F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_05A7DDDF6C8CA99BD99D9329895FFCC8_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_994B8E70FD77A182965F9329895F031F" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_05A7DDDF6C8CA99BD99D9329895FFCC8_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_05A7DDDF6C8CA99BD99D9329895FFCC8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_994B8E70FD77A182965F9329895F031F" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_05A7DDDF6C8CA99BD99D9329895FFCC8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_17326F70F57CFDEB3EEA9329895F55F4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_05A7DDDF6C8CA99BD99D9329895FFCC8" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_17326F70F57CFDEB3EEA9329895F55F4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_00E12CCE5D565467B37F9329895F85FC" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_05A7DDDF6C8CA99BD99D9329895FFCC8" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_00E12CCE5D565467B37F9329895F85FC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_79162A2A996969082FE99329895F913D" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_05A7DDDF6C8CA99BD99D9329895FFCC8" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_79162A2A996969082FE99329895F913D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_4A209CC641BA28CEC20F9329895FF19A" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D331278054B83F6D016C9329895F23C3" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_4A209CC641BA28CEC20F9329895FF19A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_748BB554ED3F3626C1549329895FBAF0_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_4A209CC641BA28CEC20F9329895FF19A" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_748BB554ED3F3626C1549329895FBAF0_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_748BB554ED3F3626C1549329895FBAF0" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_4A209CC641BA28CEC20F9329895FF19A" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_748BB554ED3F3626C1549329895FBAF0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_USTreasurySecuritiesMember" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_5D37B78C87D75DC543C29329895FEEB8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_748BB554ED3F3626C1549329895FBAF0" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_5D37B78C87D75DC543C29329895FEEB8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_BF059B724EB19D0A66D39329895FC462" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_748BB554ED3F3626C1549329895FBAF0" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_BF059B724EB19D0A66D39329895FC462" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ExchangeTradedFundsMember" xlink:label="loc_us-gaap_ExchangeTradedFundsMember_10C9BFEC33A403DF6A549329895F6D7A" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_748BB554ED3F3626C1549329895FBAF0" xlink:to="loc_us-gaap_ExchangeTradedFundsMember_10C9BFEC33A403DF6A549329895F6D7A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_179B511A9D8348A301809329895F8E8A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:to="loc_us-gaap_AvailableForSaleSecurities_179B511A9D8348A301809329895F8E8A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TradingSecurities" xlink:label="loc_us-gaap_TradingSecurities_07000FC8F707D18FA6059329895F84F9" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:to="loc_us-gaap_TradingSecurities_07000FC8F707D18FA6059329895F84F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecurities" xlink:label="loc_us-gaap_MarketableSecurities_24EA597B6F4FDD05A7CD9329895F2C7C" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:to="loc_us-gaap_MarketableSecurities_24EA597B6F4FDD05A7CD9329895F2C7C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodFaithAndMarginDepositsWithBrokerDealers" xlink:label="loc_us-gaap_GoodFaithAndMarginDepositsWithBrokerDealers_B3B9D609CB504D7232709329895FE944" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:to="loc_us-gaap_GoodFaithAndMarginDepositsWithBrokerDealers_B3B9D609CB504D7232709329895FE944" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_222F76DF6D3B5A742EDA9329895F602C" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_222F76DF6D3B5A742EDA9329895F602C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_15656249AE2EA3C2FF849329895FE870" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_15656249AE2EA3C2FF849329895FE870" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_7F3EEDC4C1BF599A7DB49329895FD5E5" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_7F3EEDC4C1BF599A7DB49329895FD5E5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_A1F58F3DC9440C9DE2A19329895FA4EB" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0F3D1FCCDABC3DEBFD5F9329895F1BD8" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_A1F58F3DC9440C9DE2A19329895FA4EB" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/FairValueMeasurementsReconciliationUsingSignificantUnobservableInputsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_FC2AA79C0E5D485DC20C81D65C841260" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_43DDAA9BF501B6BFA7C781D65C849CAA" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_FC2AA79C0E5D485DC20C81D65C841260" xlink:to="loc_us-gaap_StatementTable_43DDAA9BF501B6BFA7C781D65C849CAA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_457F72046C9378DBC4F581D65C84A88A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_43DDAA9BF501B6BFA7C781D65C849CAA" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_457F72046C9378DBC4F581D65C84A88A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_FEFFF2D14FC418BC8E3181D65C841F6C_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_457F72046C9378DBC4F581D65C84A88A" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_FEFFF2D14FC418BC8E3181D65C841F6C_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_FEFFF2D14FC418BC8E3181D65C841F6C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_457F72046C9378DBC4F581D65C84A88A" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_FEFFF2D14FC418BC8E3181D65C841F6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_666C70E63D880146ED7D81D65C841AC2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_FEFFF2D14FC418BC8E3181D65C841F6C" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_666C70E63D880146ED7D81D65C841AC2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4ECF271639F6E32ACF4981D65C84C46A" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_43DDAA9BF501B6BFA7C781D65C849CAA" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4ECF271639F6E32ACF4981D65C84C46A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8F40B75596626DF670CF81D65C84E1C4_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4ECF271639F6E32ACF4981D65C84C46A" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8F40B75596626DF670CF81D65C84E1C4_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8F40B75596626DF670CF81D65C84E1C4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4ECF271639F6E32ACF4981D65C84C46A" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8F40B75596626DF670CF81D65C84E1C4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_AB84F87F7358E25767BB81D65C84E091" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8F40B75596626DF670CF81D65C84E1C4" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_AB84F87F7358E25767BB81D65C84E091" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_77958C84E72CF2CA3A2A81D65C844314" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_FC2AA79C0E5D485DC20C81D65C841260" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_77958C84E72CF2CA3A2A81D65C844314" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_08239B49D2BA14C04A2181D65C8E8A03" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_FC2AA79C0E5D485DC20C81D65C841260" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_08239B49D2BA14C04A2181D65C8E8A03" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_E477D0F9CF72C7463ACA81D65C8E4800" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_08239B49D2BA14C04A2181D65C8E8A03" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_E477D0F9CF72C7463ACA81D65C8E4800" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/FairValueMeasurementsTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/Guarantees" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/GuaranteesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="loc_us-gaap_GuaranteeObligationsLineItems_8381436E38673721B30481D65CC0581E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:label="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_ACF9D8C23F7AFEDFA8B581D65CC0C28A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_8381436E38673721B30481D65CC0581E" xlink:to="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_ACF9D8C23F7AFEDFA8B581D65CC0C28A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_F7EA9BEBF432870D966481D65CC01561" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_ACF9D8C23F7AFEDFA8B581D65CC0C28A" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_F7EA9BEBF432870D966481D65CC01561" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_7CA655F7A4BC2277031581D65CC01CE2_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_F7EA9BEBF432870D966481D65CC01561" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_7CA655F7A4BC2277031581D65CC01CE2_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_7CA655F7A4BC2277031581D65CC01CE2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_F7EA9BEBF432870D966481D65CC01561" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_7CA655F7A4BC2277031581D65CC01CE2" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_FamilyFarmerAndRanchersProtectionFundMember" xlink:label="loc_cme_FamilyFarmerAndRanchersProtectionFundMember_0E12A109D09EFC77E8C081D65CC01971" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_7CA655F7A4BC2277031581D65CC01CE2" xlink:to="loc_cme_FamilyFarmerAndRanchersProtectionFundMember_0E12A109D09EFC77E8C081D65CC01971" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_AgreementAutomaticRenewalPeriod" xlink:label="loc_cme_AgreementAutomaticRenewalPeriod_71F618BA7C174B1DE8B781D65CC0E1E3" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_8381436E38673721B30481D65CC0581E" xlink:to="loc_cme_AgreementAutomaticRenewalPeriod_71F618BA7C174B1DE8B781D65CC0E1E3" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_GuaranteeCollateral" xlink:label="loc_cme_GuaranteeCollateral_92A04818D6EEAFB2666A81D65CC0E20B" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_8381436E38673721B30481D65CC0581E" xlink:to="loc_cme_GuaranteeCollateral_92A04818D6EEAFB2666A81D65CC0E20B" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_Paymentperparticipant" xlink:label="loc_cme_Paymentperparticipant_C3F0761985D31E82563081D65CC0D287" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_8381436E38673721B30481D65CC0581E" xlink:to="loc_cme_Paymentperparticipant_C3F0761985D31E82563081D65CC0D287" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_Paymentpercooperative" xlink:label="loc_cme_Paymentpercooperative_278E0AE882258142B3AE81D65CC0F5E5" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_8381436E38673721B30481D65CC0581E" xlink:to="loc_cme_Paymentpercooperative_278E0AE882258142B3AE81D65CC0F5E5" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_Futurelosses" xlink:label="loc_cme_Futurelosses_8CC4CF2A26910CDF7F4381D65CC0BC3F" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_8381436E38673721B30481D65CC0581E" xlink:to="loc_cme_Futurelosses_8CC4CF2A26910CDF7F4381D65CC0BC3F" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_PaymentsunderGuarantee" xlink:label="loc_cme_PaymentsunderGuarantee_63E8DF3646D374B32AD081D65CC08FEB" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_8381436E38673721B30481D65CC0581E" xlink:to="loc_cme_PaymentsunderGuarantee_63E8DF3646D374B32AD081D65CC08FEB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_90162409418F7703F3EE81D65CC0F213" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_8381436E38673721B30481D65CC0581E" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_90162409418F7703F3EE81D65CC0F213" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwill" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwillComponentsOfIntangibleAssetsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_712874EE6B94CCE4224481D65CFC8455" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2358DAEC945893E601AF81D65CFC0801" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_712874EE6B94CCE4224481D65CFC8455" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2358DAEC945893E601AF81D65CFC0801" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_BF6B3EFA3077A938D96081D65CFCA4E1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2358DAEC945893E601AF81D65CFC0801" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_BF6B3EFA3077A938D96081D65CFCA4E1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B2C1B775FF39C6D8A2FA81D65CFC722B_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_BF6B3EFA3077A938D96081D65CFCA4E1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B2C1B775FF39C6D8A2FA81D65CFC722B_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B2C1B775FF39C6D8A2FA81D65CFC722B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_BF6B3EFA3077A938D96081D65CFCA4E1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B2C1B775FF39C6D8A2FA81D65CFC722B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_8A7A4148FEFB8B14C0CF81D65CFC7764" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B2C1B775FF39C6D8A2FA81D65CFC722B" xlink:to="loc_us-gaap_CustomerRelationshipsMember_8A7A4148FEFB8B14C0CF81D65CFC7764" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LeaseAgreementsMember" xlink:label="loc_us-gaap_LeaseAgreementsMember_271BCF4872C01E52538F81D65CFCEB59" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B2C1B775FF39C6D8A2FA81D65CFC722B" xlink:to="loc_us-gaap_LeaseAgreementsMember_271BCF4872C01E52538F81D65CFCEB59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_727092BCAA944D5B5CD681D65CFCBB3F" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B2C1B775FF39C6D8A2FA81D65CFC722B" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_727092BCAA944D5B5CD681D65CFCBB3F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="loc_us-gaap_TradeNamesMember_0956BB8462550198BD9F81D65CFC2456" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B2C1B775FF39C6D8A2FA81D65CFC722B" xlink:to="loc_us-gaap_TradeNamesMember_0956BB8462550198BD9F81D65CFC2456" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMember" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMember_CC7CC663CFEE17B5F87481D65CFC1188" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B2C1B775FF39C6D8A2FA81D65CFC722B" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMember_CC7CC663CFEE17B5F87481D65CFC1188" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_C43FBD9EB1D492578D2E81D65CFCD0AC" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2358DAEC945893E601AF81D65CFC0801" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_C43FBD9EB1D492578D2E81D65CFCD0AC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_E4F03CCFC7A2D5C940B881D65CFCDEDD_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_C43FBD9EB1D492578D2E81D65CFCD0AC" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_E4F03CCFC7A2D5C940B881D65CFCDEDD_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_E4F03CCFC7A2D5C940B881D65CFCDEDD" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_C43FBD9EB1D492578D2E81D65CFCD0AC" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_E4F03CCFC7A2D5C940B881D65CFCDEDD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="loc_us-gaap_TradeNamesMember_769E47A5ED16E64DEBAE81D65CFC1489" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_E4F03CCFC7A2D5C940B881D65CFCDEDD" xlink:to="loc_us-gaap_TradeNamesMember_769E47A5ED16E64DEBAE81D65CFC1489" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_54A5C0DDC6BB179645AF81D65CFC4AC9" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_712874EE6B94CCE4224481D65CFC8455" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_54A5C0DDC6BB179645AF81D65CFC4AC9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_C34B33936DF9B8D8545981D65CFC5127" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_712874EE6B94CCE4224481D65CFC8455" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_C34B33936DF9B8D8545981D65CFC5127" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_90601093BF943061628181D65CFCF604" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_712874EE6B94CCE4224481D65CFC8455" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_90601093BF943061628181D65CFCF604" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_A41CC2CCA482E0654FF781D65CFCF151" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_712874EE6B94CCE4224481D65CFC8455" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_A41CC2CCA482E0654FF781D65CFCF151" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherIndefiniteLivedIntangibleAssets" xlink:label="loc_us-gaap_OtherIndefiniteLivedIntangibleAssets_EFDCF014CB0921F0733081D65CFC55C4" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_712874EE6B94CCE4224481D65CFC8455" xlink:to="loc_us-gaap_OtherIndefiniteLivedIntangibleAssets_EFDCF014CB0921F0733081D65CFC55C4" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwillFutureEstimatedAmortizationExpenseDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwillNarrativeDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/IntangibleAssetsAndGoodwillTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/PerformanceBondsAndGuarantyFundContributionsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="loc_us-gaap_GuaranteeObligationsLineItems_E16B1DA6B7B4E3FBC09293625247E7BC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:label="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_304DADA8AFBC1A95430293625246EE4B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_E16B1DA6B7B4E3FBC09293625247E7BC" xlink:to="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_304DADA8AFBC1A95430293625246EE4B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_AB21A2338BA0572A0EA4936252479CAB" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_304DADA8AFBC1A95430293625246EE4B" xlink:to="loc_us-gaap_InvestmentTypeAxis_AB21A2338BA0572A0EA4936252479CAB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_C56F0E6F1909FE1CB5C9936A4203C105_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_AB21A2338BA0572A0EA4936252479CAB" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_C56F0E6F1909FE1CB5C9936A4203C105_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentDomain" xlink:label="loc_invest_InvestmentDomain_ADA8EC2E8F1E3298C8DD93625247F6F4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_AB21A2338BA0572A0EA4936252479CAB" xlink:to="loc_invest_InvestmentDomain_ADA8EC2E8F1E3298C8DD93625247F6F4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_C56F0E6F1909FE1CB5C9936A4203C105" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentDomain_ADA8EC2E8F1E3298C8DD93625247F6F4" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_C56F0E6F1909FE1CB5C9936A4203C105" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_USTreasurySecuritiesMember" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_72B105B7745767E5499893625247C408" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_C56F0E6F1909FE1CB5C9936A4203C105" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_72B105B7745767E5499893625247C408" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_48961067F140310F8B43936252473E82" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_E16B1DA6B7B4E3FBC09293625247E7BC" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_48961067F140310F8B43936252473E82" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_A10D1ADD03E5CA3EDD1D936252476238" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_E16B1DA6B7B4E3FBC09293625247E7BC" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_A10D1ADD03E5CA3EDD1D936252476238" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_AverageDailyClearingSettlement" xlink:label="loc_cme_AverageDailyClearingSettlement_DFF396BB46F4C6E03C9593625247D954" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_E16B1DA6B7B4E3FBC09293625247E7BC" xlink:to="loc_cme_AverageDailyClearingSettlement_DFF396BB46F4C6E03C9593625247D954" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.cmegroup.com/role/PerformanceBondsAndGuarantyFundContributionsNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/PerformanceBondsAndGuarantyFundContributionsTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/SubsequentEvents" xlink:type="extended" />
  <definitionLink xlink:role="http://www.cmegroup.com/role/SubsequentEventsSubsequentEventsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_8D3AE0AA4CC921FC3527932C01C0C728" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_0AF1E8BF42844A970D80932C01C0F523" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_8D3AE0AA4CC921FC3527932C01C0C728" xlink:to="loc_us-gaap_SubsequentEventTable_0AF1E8BF42844A970D80932C01C0F523" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_A4D6E7B6F2E673E26904932C01C0F2ED" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_0AF1E8BF42844A970D80932C01C0F523" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_A4D6E7B6F2E673E26904932C01C0F2ED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4E40E185801FCCF82ED1932C01C02D99_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_A4D6E7B6F2E673E26904932C01C0F2ED" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4E40E185801FCCF82ED1932C01C02D99_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4E40E185801FCCF82ED1932C01C02D99" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_A4D6E7B6F2E673E26904932C01C0F2ED" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4E40E185801FCCF82ED1932C01C02D99" xlink:type="arc" />
    <loc xlink:href="cme-20140630.xsd#cme_BusinessAcquisitionAnnouncementMember" xlink:label="loc_cme_BusinessAcquisitionAnnouncementMember_CA1DD3E2FEFD0AD4F099932C01C0F4F5" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_4E40E185801FCCF82ED1932C01C02D99" xlink:to="loc_cme_BusinessAcquisitionAnnouncementMember_CA1DD3E2FEFD0AD4F099932C01C0F4F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds" xlink:label="loc_us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds_CFCF0FEB271BE005DD34932C01D0BFB1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_8D3AE0AA4CC921FC3527932C01C0C728" xlink:to="loc_us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds_CFCF0FEB271BE005DD34932C01D0BFB1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromSaleOfOtherInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfOtherInvestments_EE661F5C1833B4B7D603932C01C0AAF4" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_8D3AE0AA4CC921FC3527932C01C0C728" xlink:to="loc_us-gaap_ProceedsFromSaleOfOtherInvestments_EE661F5C1833B4B7D603932C01C0AAF4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_7A011A299085E1C46FF7932C01D0041E" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_8D3AE0AA4CC921FC3527932C01C0C728" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_7A011A299085E1C46FF7932C01D0041E" xlink:type="arc" />
  </definitionLink>
</linkbase>
