Definitions:

1. the attire characteristic of a country or a time or a social class noun
   • They wore their national costume to the social event.
2. the attire worn in a play or at a fancy dress ball noun
   • We won the prize for best costume.
3. unusual or period attire not characteristic of or appropriate to the time and place noun
   • In spite of the heat, the child insisted on wearing a woollen costume.

Synonyms:

• dress up

NearBy Words:

• costumed
• costumer