Costume(n.) Dress in general; esp., the distinctive style of dress of a people, class, or period.
Costume(n.) Such an arrangement of accessories, as in a picture, statue, poem, or play, as is appropriate to the time, place, or other circumstances represented or described.
Costume(n.) A character dress, used at fancy balls or for dramatic purposes.
Costumer(n.) One who makes or deals in costumes, as for theaters, fancy balls, etc.

Words within costumed