Other forms: duplicated; duplicates; duplicating

Duplicate describes something that's an exact copy. If you tend to accidentally lock yourself out of your car, it's a good idea to carry a duplicate key with you just in case.

The word duplicate is useful when you're talking about a copy of something, like a duplicate of your birth certificate that you keep in a file, or a duplicate driver's license that you apply for after losing the original one. The verb duplicate is pronounced differently, with a long a sound, and it means to make a copy of or to multiply times two. The Latin root, duplicatus, means "to double."

Definitions of duplicate
  1. verb
    duplicate or match
    synonyms: parallel, twin
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    type of:
    agree, check, correspond, fit, gibe, jibe, match, tally
    be compatible, similar, or consistent; coincide in their characteristics
  2. verb
    make a duplicate or duplicates of
    “Could you please duplicate this letter for me?”
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    type of:
    make a copy or equivalent of
  3. verb
    make or do or perform again
    synonyms: double, reduplicate, repeat, replicate
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    copy, replicate
    reproduce or make an exact copy of
    repeat stages of evolutionary development during the embryonic phase of life
    geminate, reduplicate
    form by reduplication
    type of:
    make a copy or equivalent of
  4. verb
    increase twofold
    synonyms: double
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    double again
    arrange or combine in pairs
    type of:
    manifold, multiply
    combine or increase by multiplication
Definitions of duplicate
  1. noun
    a copy that corresponds to an original exactly
    “he made a duplicate for the files”
    synonyms: duplication
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    backup, computer backup
    (computer science) a copy of a file or directory on a separate storage device
    counterpart, similitude, twin
    a duplicate copy
    match, mate
    an exact duplicate
    type of:
    a thing made to be similar or identical to another thing
  2. noun
    something additional of the same kind
    synonyms: extra
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    type of:
    artefact, artifact
    a man-made object taken as a whole
  3. adjective
    being two identical
    synonyms: matching, twin, twinned
    going well together; possessing harmonizing qualities
  4. adjective
    identically copied from an original
    “a duplicate key”
    closely similar or comparable in kind or quality or quantity or degree
DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘duplicate'. Views expressed in the examples do not represent the opinion of or its editors. Send us feedback
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