Costume

[noun kos-toom, -tyoom; verb ko-stoom, -styoom] /noun ˈkɒs tum, -tyum; verb kɒˈstum, -ˈstyum/

noun
1.
a style of dress, including accessories and hairdos, especially that peculiar to a nation, region, group, or historical period.
2.
dress or garb characteristic of another period, place, person, etc., as worn on the stage or at balls.
3.
fashion of dress appropriate to a particular occasion or season:
dancing costume; winter costume.
4.
a set of garments, especially women’s garments, selected for wear at a single time; outfit; ensemble.
verb (used with object), costumed, costuming.
5.
to dress; furnish with a costume; provide appropriate dress for:
to costume a play.
adjective
6.
of or characterized by the wearing of costumes:
a costume party.
7.
meant for use with or appropriate to a specific costume:
costume accessories.
/ˈkɒstjuːm/
noun
1.
a complete style of dressing, including all the clothes, accessories, etc, worn at one time, as in a particular country or period; dress: national costume
2.
(old-fashioned) a woman’s suit
3.
a set of clothes, esp unusual or period clothes, worn in a play by an actor or at a fancy dress ball: a jester’s costume
4.
short for swimming costume
verb (transitive)
5.
to furnish the costumes for (a show, film, etc)
6.
to dress (someone) in a costume
n.

1715, “style of dress,” an art term, from French costume (17c.), from Italian costume “fashion, habit,” from Latin consuetudinem (nominative consuetudo) “custom, habit, usage.” Essentially the same word as custom but arriving by a different etymology. From “customary clothes of the particular period in which the scene is laid,” meaning broadened by 1818 to “any defined mode of dress.” Costume jewelry is first attested 1933.
v.

1823, from costume (n.). Related: Costumed; costuming.