<p><strong>Noun</strong></p><ul><li>a style of dress, including accessories and hairdos, especially that peculiar to a nation, region, group, or historical period</li><li>dress or garb characteristic of another period, place, person, etc., as worn on the stage or at balls</li><li>fashion of dress appropriate to a particular occasion or season: dancing costume; winter costume</li><li>a set of garments, especially women's garments, selected for wear at a single time; outfit; ensemble</li></ul><p><strong>Verb</strong></p><ul><li>to dress; furnish with a costume; provide appropriate dress for: to costume a play</li></ul><p><strong>Adjective</strong></p><ul><li>of or characterized by the wearing of costumes: a costume party</li><li>meant for use with or appropriate to a specific costume: costume accessories</li></ul>