costume
     n 1: the attire worn in a play or at a fancy dress ball; "he won
          the prize for best costume"
     2: unusual or period attire not characteristic of or
        appropriate to the time and place; "in spite of the heat
        he insisted on his woolen costume"
     3: the prevalent fashion of dress (including accessories and
        hair style as well as garments)
     4: the attire characteristic of a country or a time or a social
        class; "he wore his national costume"
     v 1: dress in a costume; "We dressed up for Halloween as
          pumpkins" [syn: {dress up}]
     2: furnish with costumes; as for a film or play
Source: WordNet® 2.0