Definition

1. Adjective:

   • Being two identical; identically copied from an original: Refers to something that is an exact copy of another thing.
   • Consisting of two corresponding parts: Refers to something that is doubled or paired.

2. Noun:

   • A copy that corresponds to an original exactly: An object that is identical to another.
   • Something additional of the same kind: An extra item that is the same as the one already possessed.

3. Verb:

   • To make a duplicate or duplicates of: To produce an exact copy of something.
   • To double or match: To make or become double; to correspond exactly to something else.
   • To make or do or perform again: To repeat an action or performance.

Usage Examples

• Adjective:

  • He was given a duplicate key to the office.
  • The artist kept a duplicate set of brushes in his studio.

• Noun:

  • Please make a duplicate of this report for our records.
  • I always keep a duplicate of my passport in a safe place.

• Verb:

  • Could you please duplicate this document for the meeting?
  • The software can duplicate files with a single click.
  • She managed to duplicate her success from the previous year.

Advanced Usage

• In duplicate: Prepared or done in two identical copies.
  • All applications must be submitted in duplicate.
• To duplicate efforts: To unnecessarily repeat work that has already been done.
  • We need better communication to avoid duplicating efforts across departments.

Variants and Related Words

• Duplication (n): The action or process of duplicating something.
  • The duplication of data is a key part of the backup process.
• Duplicator (n): A machine that makes copies of documents.
  • The old mimeograph was a type of duplicator.

Synonyms

• Copy (n/v): A thing made to be similar or identical to another.
• Replicate (v): To make an exact copy of; to reproduce.
• Double (v/adj): To become twice as much or as many; consisting of two equal, identical, or similar parts or things.

Related Phrasal Verbs

(Note: "Duplicate" is not commonly used in phrasal verb constructions. Its meaning is typically expressed directly.)

Related Idioms

• A carbon copy: An exact duplicate (originally from carbon paper used for copying).
  • The new model is a carbon copy of last year's design.

Adjective

1. being two identical
2. identically copied from an original
   • a duplicate key

Noun

1. a copy that corresponds to an original exactly
   • he made a duplicate for the files
2. something additional of the same kind
   • he always carried extras in case of an emergency

Verb

1. increase twofold
   • The population doubled within 50 years
2. make a duplicate or duplicates of
   • Could you please duplicate this letter for me?
3. duplicate or match
   • The polished surface twinned his face and chest in reverse
4. make or do or perform again
   • He could never replicate his brilliant performance of the magic trick