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        <link:definition>0030 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY</link:definition>
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        <link:definition>0035 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical)</link:definition>
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        <link:definition>0040 - Statement - CONSOLIDATED STATEMENT OF CASH FLOWS</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureRecentAccountingPolicies" id="DisclosureRecentAccountingPolicies">
        <link:definition>1020 - Disclosure - Recent Accounting Policies</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureInventories" id="DisclosureInventories">
        <link:definition>1030 - Disclosure - Inventories</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosurePropertyPlantAndEquipment" id="DisclosurePropertyPlantAndEquipment">
        <link:definition>8000 - Disclosure - Property, Plant and Equipment</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureGoodwillAndOtherIntangibles" id="DisclosureGoodwillAndOtherIntangibles">
        <link:definition>1070 - Disclosure - Goodwill and Other Intangibles</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureCashSurrenderValueOfLifeInsurance" id="DisclosureCashSurrenderValueOfLifeInsurance">
        <link:definition>8010 - Disclosure - Cash Surrender Value of Life Insurance</link:definition>
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        <link:definition>8020 - Disclosure - Long-Term Debt and Notes Payable</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureIncomeTaxes" id="DisclosureIncomeTaxes">
        <link:definition>8030 - Disclosure - Income Taxes</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureOperatingLeases" id="DisclosureOperatingLeases">
        <link:definition>8040 - Disclosure - Operating Leases</link:definition>
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        <link:definition>1090 - Disclosure - Pensions and Other Post Retirement Benefits</link:definition>
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        <link:definition>8050 - Disclosure - Stockholders' Equity</link:definition>
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        <link:definition>1060 - Disclosure - Segment Data &amp; Foreign Operations</link:definition>
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        <link:definition>8060 - Disclosure - Export Sales and Foreign Operations</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureSupplementalCashFlowData" id="DisclosureSupplementalCashFlowData">
        <link:definition>8070 - Disclosure - Supplemental Cash Flow Data</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureAcquisitions" id="DisclosureAcquisitions">
        <link:definition>8080 - Disclosure - Acquisitions</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureDiscontinuedOperations" id="DisclosureDiscontinuedOperations">
        <link:definition>8090 - Disclosure - Discontinued Operations</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureFairValueMeasurements" id="DisclosureFairValueMeasurements">
        <link:definition>1100 - Disclosure - Fair Value Measurements</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureRelatedPartyTransactions" id="DisclosureRelatedPartyTransactions">
        <link:definition>8100 - Disclosure - Related Party Transactions</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureNetIncomePerShare" id="DisclosureNetIncomePerShare">
        <link:definition>1040 - Disclosure - Net Income Per Share</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureCommitmentsAndContingencies" id="DisclosureCommitmentsAndContingencies">
        <link:definition>1080 - Disclosure - Commitments and Contingencies</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureSelectedQuarterlyFinancialDataUnaudited" id="DisclosureSelectedQuarterlyFinancialDataUnaudited">
        <link:definition>8110 - Disclosure - Selected Quarterly Financial Data (Unaudited)</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureValuationAndQualifyingAccounts" id="DisclosureValuationAndQualifyingAccounts">
        <link:definition>8120 - Disclosure - Valuation and Qualifying Accounts</link:definition>
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        <link:definition>0000 - Document - Document and Entity Information</link:definition>
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        <link:definition>1010 - Disclosure - Basis of Presentation</link:definition>
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        <link:definition>1050 - Disclosure - Stock Based Compensation</link:definition>
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        <link:definition>1110 - Disclosure - Sale Leaseback Transaction</link:definition>
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      <link:roleType roleURI="http://www.chasecorp.com/role/DisclosureAssetsHeldForSale" id="DisclosureAssetsHeldForSale">
        <link:definition>1120 - Disclosure - Assets Held for Sale</link:definition>
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