Definition of "costume" []

• A style of dress, including garments, accessories, and hairstyle, especially as characteristic of a particular country, period, or people. (noun)
• An outfit or a disguise worn on Mardi Gras, Halloween, or similar occasions. (noun)
• A set of clothes appropriate for a particular occasion or season. (noun)
• To put a costume on; dress. (verb-transitive)
• To design or furnish costumes for. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "And yes, that means that I only have 11 days to be struck by creative brilliance, because I still don't have a costume and last time I checked, the invitation to the * costume party* did indicate that it would be preferable to wear a * costume*."
• "Our tradition of collecting candy in costume is mere child's play to Roman Catholic countries."
• "But it still took two shocks for DC Comics to rethink the Robin costume from the bottom up."