duplicate Meaning, Definition & Usage

  1. noun something additional of the same kind
    extra.
    • he always carried extras in case of an emergency
  2. noun a copy that corresponds to an original exactly
    duplication.
    • he made a duplicate for the files
  3. verb make or do or perform again
    double; repeat; replicate; reduplicate.
    • He could never replicate his brilliant performance of the magic trick
  4. verb duplicate or match
    twin; parallel.
    • The polished surface twinned his face and chest in reverse
  5. verb make a duplicate or duplicates of
    • Could you please duplicate this letter for me?
  6. verb increase twofold
    double.
    • The population doubled within 50 years
  7. adjective satellite identically copied from an original
    • a duplicate key
  8. adjective satellite being two identical
    twinned; matching; twin.

WordNet

Du"pli*cate adjective
Etymology
L. duplicatus, p. p. of duplicare to double, fr. duplex double, twofold. See Duplex.
Definitions
  1. Double; twofold.
Du"pli*cate noun
Definitions
  1. That which exactly resembles or corresponds to something else; another, correspondent to the first; hence, a copy; a transcript; a counterpart.
    I send a duplicate both of it and my last dispatch. Sir W. Temple.
  2. (Law) An original instrument repeated; a document which is the same as another in all essential particulars, and differing from a mere copy in having all the validity of an original. Burrill.
Du"pli*cate transitive verb
Wordforms
imperfect & past participle Duplicated ; present participle & verbal noun Duplicating
Definitions
  1. To double; to fold; to render double.
  2. To make a duplicate of (something); to make a copy or transcript of. Glanvill.
  3. (Biol.) To divide into two by natural growth or spontaneous action; as, infusoria duplicate themselves.

Webster 1913