noun
evening dress; evening gown
A formal dress worn for evening events, typically floor-length. The term is a direct loan from English and is used in the same way.
パーティーにはイブニングドレスを着ていくつもりです。
I plan to wear an evening dress to the party.
Variant with interpunct; less common but still seen.
Loanword from English 'evening dress'.