noun
formal dress; formal wear
Refers to formal attire, such as evening gowns or tuxedos, for occasions like ceremonies, parties, or official events.
結婚式にはフォーマルドレスを着ていくつもりです。
I plan to wear a formal dress to the wedding.
このパーティーはフォーマルドレスが指定されています。
Formal dress is required for this party.