WordWeb Online

1. The attire worn in a play or at a fancy dress ball
   "he won the prize for best costume"
    
2. Unusual or period attire not characteristic of or appropriate to the time and place
   "in spite of the heat he insisted on his woollen costume"
    
3. The prevalent fashion of dress (including accessories and hair style as well as garments)
    
4. The attire characteristic of a country or a time or a social class
   "he wore his national costume"

1. Dress in a costume
   - dress up
    
2. (performing arts) furnish with costumes; as for a film or play

Derived forms: costuming, costumed, costumes

Type of: apparel, attire, clothe, dress, enclothe, fit out, furnish, garb, garment, habilitate [archaic], offer, provide, raiment [archaic], render, supply, tog [informal]

Encyclopedia: Costume, Clerical