How do you spell Costume

Available Definitions:
1)  n. - Dress in general; esp., the distinctive style of dress of a people, class, or period.
2)  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.
3)  n. - A character dress, used at fancy balls or for dramatic purposes.