1. costume

the attire worn in a play or at a fancy dress ball

Example Sentences:
'he won the prize for best costume'

2. costume

unusual or period attire not characteristic of or appropriate to the time and place

Example Sentences:
'in spite of the heat he insisted on his woolen costume'

3. costume

the prevalent fashion of dress (including accessories and hair style as well as garments)

4. costume

the attire characteristic of a country or a time or a social class

Example Sentences:
'he wore his national costume'

5. costume, dress up

dress in a costume

Example Sentences:
'We dressed up for Halloween as pumpkins'

• dress up

6. costume

furnish with costumes; as for a film or play