Meaning of “costume” in the English Dictionary

american-english dictionary

"costume" in British English

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costumenoun

uk /ˈkɒs.tʃuːm/ us /ˈkɑː.stuːm/

B2 [ C or U ] the set of clothes typical of a particular country or period of history, or suitable for a particular activity:

Singers performing Mozart's operas often dress in/wear historical costume.
The dancers leading the procession were in colourful and elaborate costumes.
UK The shop has a good selection of bikinis and bathing/swimming costumes.

B2 [ C ] UK also fancy-dress costume a set of clothes worn in order to look like someone or something else, especially for a party or as part of an entertainment:

Our host was wearing a clown costume.
The children were dressed in Halloween costumes.

More examples

  • The children were wearing traditional national costume.
  • The movie won Oscars for best costumes and best screenplay in this year's awards.
  • She looked every inch a vampire in her costume.

(Definition of “costume” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"costume" in American English

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costumenoun [ C/U ]

us /ˈkɑs·tum/

a set of clothes worn in order to look like someone else, esp. for a party or as part of an entertainment:

[ C ] a clown costume

A costume is also the set of clothes typical of a particular country or period of history:

[ U ] The dancers dressed in national costume.

(Definition of “costume” from the Cambridge Academic Content Dictionary © Cambridge University Press)