舞ぶ踏とう服ふく

noun

ball dress; dancing clothes

Refers to formal attire worn for ballroom or stage dancing, not casual dancewear.

• 彼かの女じょは舞ぶ踏とう服ふくに着き替がえてパーティーに出でかけた。

  She changed into her ball dress and went out to the party.