- 1[countable, uncountable] the clothes worn by people from a particular place or during a particular historical period see national costume
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- 2[countable, uncountable] the clothes worn by actors in a play or movie, or worn by someone to make them look like something else The actors were still in costume and makeup. She has four costume changes during the play. He went to the party in a giant chicken costume. a costume designer
Check pronunciation: costume