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        <link:definition>2110100 - Disclosure - Balance sheet components</link:definition>
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        <link:definition>2104100 - Disclosure - Basis of presentation</link:definition>
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        <link:definition>2139100 - Disclosure - Commitments and contingencies</link:definition>
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        <link:definition>2125100 - Disclosure - Comprehensive income (loss)</link:definition>
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        <link:definition>1001000 - Statement - Condensed Consolidated Balance Sheets</link:definition>
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        <link:definition>1003000 - Statement - Condensed Consolidated Statements of Cash Flows</link:definition>
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        <link:definition>1002000 - Statement - Condensed Consolidated Statements of Operations</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="EarningsPerShare" roleURI="http://www.pixelworks.com/role/EarningsPerShare">
        <link:definition>2128100 - Disclosure - Earnings per share</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>2119100 - Disclosure - Income taxes</link:definition>
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        <link:definition>2122100 - Disclosure - Interest expense and other, net</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>2113100 - Disclosure - Marketable securities and fair value measurements</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="Restructurings" roleURI="http://www.pixelworks.com/role/Restructurings">
        <link:definition>2116100 - Disclosure - Restructurings</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="RisksAndUncertainties" roleURI="http://www.pixelworks.com/role/RisksAndUncertainties">
        <link:definition>2138100 - Disclosure - Risks and uncertainties</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="SegmentInformation" roleURI="http://www.pixelworks.com/role/SegmentInformation">
        <link:definition>2137100 - Disclosure - Segment information</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareholdersEquity" roleURI="http://www.pixelworks.com/role/ShareholdersEquity">
        <link:definition>2134100 - Disclosure - Shareholders' equity</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>2131100 - Disclosure - Supplemental cash flow information</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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