Definitions of costume:

  • noun:   the attire worn in a play or at a fancy dress ball
    Example: "He won the prize for best costume"
  • noun:   the attire characteristic of a country or a time or a social class
    Example: "He wore his national costume"
  • noun:   unusual or period attire not characteristic of or appropriate to the time and place
    Example: "In spite of the heat he insisted on his woolen costume"
  • noun:   the prevalent fashion of dress (including accessories and hair style as well as garments)
  • verb:   furnish with costumes; as for a film or play
  • verb:   dress in a costume