duplicate — English Dictionary

Adjective

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

   Usage

   • not-comparable

   Examples

   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.

   Usage

   • not-comparable

   Examples

   duplicate whist

   duplicate Scrabble

Verb

1. To make a copy of.

   Usage

   • Transitive

   Examples

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

   Can you duplicate this kind of key?

2. To do repeatedly; to do again.

   Usage

   • Transitive

   Examples

   You don't need to duplicate my efforts.

3. To produce something equal to.

   Usage

   • Transitive

   Examples

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

Noun

1. One that resembles or corresponds to another; an identical copy.

   Usage

   • Countable
   • Uncountable

   Examples

   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

   Usage

   • Countable
   • Uncountable

3. A pawnbroker's ticket, which must be shown when redeeming a pledged item.

   Usage

   • Countable
   • Uncountable

   Examples

   More examples (1)

   "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. The game of duplicate bridge.

   Usage

   • Uncountable

   Examples

   More examples (1)

   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. The game of duplicate Scrabble.

   Usage

   • Uncountable

6. A biological specimen that was gathered alongside another specimen and represents the same species.

   Usage

   • Countable
   • Uncountable

   Examples

   Each collection, which may be a unicate or several specimens as duplicates in several herbaria, constitutes a record in the Conifer Database.

Adjective

1. identically copied from an original

   Examples

   a duplicate key

2. being two identical

   Synonyms

   matchingtwintwinned

Noun

1. something additional of the same kind

   Synonyms

   extra

   Broader terms

   artifactartefact

   Examples

   he always carried extras in case of an emergency

2. a copy that corresponds to an original exactly

   Synonyms

   duplication

   Broader terms

   copy

   Examples

   he made a duplicate for the files

Verb

1. make or do or perform again

   Synonyms

   reduplicatedoublerepeatreplicate

   Broader terms

   reproduce

   Examples

   He could never replicate his brilliant performance of the magic trick

2. duplicate or match

   Synonyms

   twinparallel

   Broader terms

   matchfitcorrespondcheckjibegibetallyagree

   Examples

   The polished surface twinned his face and chest in reverse

3. make a duplicate or duplicates of

   Broader terms

   reproduce

   Examples

   Could you please duplicate this letter for me?

4. increase twofold

   Synonyms

   double

   Broader terms

   multiplymanifold

   Examples

   The population doubled within 50 years