duplicate

adjective

1. 1

   Being the same as another; identical, often having been copied from an original.

   This is a duplicate entry.

2. 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

1. 1

   To make a copy of.

   If we duplicate the information, are we really accomplishing much?

   Can you duplicate this kind of key?

2. 2

   To do repeatedly; to do again.

   You don't need to duplicate my efforts.

3. 3

   To produce something equal to.

   He found it hard to duplicate the skills of his wife.

noun

1. 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. 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. 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;[…]"

4. 4

   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[…]

5. 5

   The game of duplicate Scrabble.

6. 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.

Forms

plural

duplicates

past tense

duplicated

past participle

duplicated

present participle

duplicating

third person singular

duplicates