costume

(noun) the attire worn in a play or at a fancy dress ball. Example: "He won the prize for best costume."

(noun) unusual or period attire not characteristic of or appropriate to the time and place. Example: "In spite of the heat he insisted on his woolen costume."

(noun) the prevalent fashion of dress (including accessories and hair style as well as garments).

(noun) the attire characteristic of a country or a time or a social class. Example: "He wore his national costume."

(verb) dress in a costume. Synonyms: dress up. Example: "We dressed up for halloween as pumpkins."

(verb) furnish with costumes; as for a film or play.