American Dictionary

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Definition costume in American English

costume noun

noun
/ˈkɑsˌtum/
1

clothes that performers wear in a play, movie, etc.

Example

The costumes, sets, and acting are all superb.

Example

a costume designer

2

clothes that you wear at a costume party, pretending to be a famous person, an animal, a character from a story, etc.

3

clothes that are typical of a particular place or of a period in history

Example

They were all dressed in 18th-century costume.

Definition costume in American English