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        <link:definition>00 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/BalanceSheets" id="BalanceSheets">
        <link:definition>01 - Statement - Consolidated Balance Sheets</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/BalanceSheetsParenthetical" id="BalanceSheetsParenthetical">
        <link:definition>011 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/StatementsOfOperations" id="StatementsOfOperations">
        <link:definition>02 - Statement - Consolidated Statements of Operations (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/StatementsOfCashFlows" id="StatementsOfCashFlows">
        <link:definition>03 - Statement - Consolidated Statements of Cash Flows (Unaudited)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/PrinciplesOfConsolidationAndBasisOfPresentation" id="PrinciplesOfConsolidationAndBasisOfPresentation">
        <link:definition>06001 - Disclosure - Principles of Consolidation and Basis of Presentation</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/GoodwillAndOtherIntangibleAssets" id="GoodwillAndOtherIntangibleAssets">
        <link:definition>06002 - Disclosure - Goodwill and Other Intangible Assets</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://rushenterprises.com/role/CommitmentsAndContingencies" id="CommitmentsAndContingencies">
        <link:definition>06003 - Disclosure - Commitments and Contingencies</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/EarningsPerShare" id="EarningsPerShare">
        <link:definition>06004 - Disclosure - Earnings Per Share</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/StockOptionsAndRestrictedStockAwards" id="StockOptionsAndRestrictedStockAwards">
        <link:definition>06005 - Disclosure - Stock Options and Restricted Stock Awards</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/FinancialInstrumentsAndFairValue" id="FinancialInstrumentsAndFairValue">
        <link:definition>06006 - Disclosure - Financial Instruments and Fair Value</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/SegmentInformation" id="SegmentInformation">
        <link:definition>06007 - Disclosure - Segment Information</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/IncomeTaxes" id="IncomeTaxes">
        <link:definition>06008 - Disclosure - Income Taxes</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://rushenterprises.com/role/Acquisitions" id="Acquisitions">
        <link:definition>06009 - Disclosure - Acquisitions</link:definition>
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      <link:roleType roleURI="http://rushenterprises.com/role/ComprehensiveIncome" id="ComprehensiveIncome">
        <link:definition>06010 - Disclosure - Comprehensive Income</link:definition>
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        <link:definition>06011 - Disclosure - Discontinued Operations</link:definition>
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