n. & v.
n. 1 a style or fashion of dress, esp. that of a particular place, time, or class. 2 a set of clothes. 3 clothing for a particular activity (swimming-costume). 4 an actor's clothes for a part. 5 a woman's matching jacket and skirt.
v.tr. provide with a costume. costume jewellery artificial jewellery worn to adorn clothes. costume play (or piece) a play in which the actors wear historical costume.
[ F f. It. f. L consuetudo CUSTOM ]