- the style of dress, including accessories, typical of a certain country, period, profession, etc.
- a set of clothes in such a style, as worn in a play or at a masquerade
- a set of outer clothes for some purpose or occasion, esp. one worn by a woman
18th-c. art term < Fr < It < L consuetudo, custom
transitive verb costumed, costuming
to provide with a costume; put a costume on; dress