01 n. One who, or that which, is substituted or put in the place of another; one who acts for another; that which stands in lieu of something else
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One who, or that which, is substituted or put in the place of another; one who acts for another; that which stands in lieu of something else(Mil.)“Hast thou not made me here thy substitute?” — Milton.“Ladies [in Shakespeare's age] . . . wore masks as the sole substitute known to our ancestors for the modern parasol.” — De Quincey.