duplicate
adjective
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being two identicalmatching
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identically copied from an original“a duplicate key”
noun
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a copy that corresponds to an original exactly“The forms were long and required that the clerk make a duplicate for each set of files.”duplication
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something additional of the same kindextra
verb
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increase twofolddouble
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make or do or perform againdouble
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make a duplicate or duplicates of“Could you please duplicate this letter for me?”
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duplicate or matchparalleltwin