costume Pronunciation: /ˈkɑːstuːm; ˈkɒstjuːm/Translate costume | into French | into German | into Italian Spanish translation of costumen 1 u (style of dress) traje (m); (for parties, disguise) disfraz (m) 2 c (wardrobe) [Theat] vestuario (m); (individual outfit) traje (m) 3 c (swimming costume) traje (m) de bañocostume in other Oxford dictionaries Definition of costume in the British & World English dictionary Definition of costume in the US English dictionary