duplicate

adjective

  1. 1

    being two identical

  2. 2

    identically copied from an original

    a duplicate key

noun

  1. 1

    a copy that corresponds to an original exactly

    he made a duplicate for the files

  2. 2

    something additional of the same kind

    he always carried extras in case of an emergency

verb

  1. 1

    increase twofold

    The population doubled within 50 years

  2. 2

    make or do or perform again

    He could never replicate his brilliant performance of the magic trick

  3. 3

    make a duplicate or duplicates of

    Could you please duplicate this letter for me?

  4. 4

    duplicate or match

    The polished surface twinned his face and chest in reverse

Synonyms

Also useful for “duplicate”:Unscrambler