What is the meaning of costume?

noun

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

verb

• Dress in a costume.
  • usage: "We dressed up for Halloween as pumpkins"
  • synonyms: dress up
• Furnish with costumes; as for a film or play. .