duplicate

Adjective

duplicate (not comparable)

1. Being the same as another; identical, often having been copied from an original.
   • This is a duplicate entry.
2. In which the hands of cards, tiles, etc. are preserved between rounds to be played again by other players.
   • duplicate whist
   • duplicate Scrabble

Verb

IPA/ˈd(j)uː.plɪˌkeɪt/British/ˈd͡ʒʉwplɪkɛjt/

duplicate (third-person singular simple present duplicates, present participle duplicating, simple past and past participle duplicated)

1. (transitive) To make a copy of.
   • If we duplicate the information, are we really accomplishing much?
   • Can you duplicate this kind of key?

   Synonyms:

   double

2. (transitive) To do repeatedly; to do again.
   • You don't need to duplicate my efforts.
3. (transitive) To produce something equal to.
   • He found it hard to duplicate the skills of his wife.

Noun

duplicate (countable and uncountable, plural duplicates)

1. One that resembles or corresponds to another; an identical copy.
   • This is a duplicate, but a very good replica.
   • July 20, 1678, William Temple, letter to the Lord Treasurer
     I send a duplicate both of it and my last dispatch.
2. 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
3. A pawnbroker's ticket, which must be shown when redeeming a pledged item.
   • "Sir, I hope you will excuse what I am going to say; but having observed that you frequently pledge similar goods to these at our shop, which are afterwards taken out by other persons, I take for granted you are in the habit of selling the duplicates;[…]"1819, James Hardy Vaux, Memoirs of James Hardy Vaux, Vol. II, Chapter VI, p. 207

   Synonyms:

   tombstone

4. (uncountable) The game of duplicate bridge.
   • The momentary madness which infects bridge players occurs frequently at rubber bridge and duplicate; and though it rarely results in murder, it often terminates marriages and close friendships[…]1999, Matthew Granovetter, Murder at the Bridge Table, page 6
5. (uncountable) The game of duplicate Scrabble.
6. A biological specimen that was gathered alongside another specimen and represents the same species.
   • Each collection, which may be a unicate or several specimens as duplicates in several herbaria, constitutes a record in the Conifer Database.2013, Aljos Farjon, Denis Filer, An Atlas of the World's Conifers: An Analysis of their Distribution, Biogeography, Diversity and Conservation Status, Koninklijke Brill, →ISBN, page 3