noun
after-dark clothing; evening wear
Refers to clothes worn after dusk, such as cocktail dresses or evening dresses. A loanword from English 'after dark' used in fashion contexts.
from English after dark
パーティーにはアフターダークなドレスを着ていった。
I wore an after-dark dress to the party.
Variant with a middle dot; less common but still seen.
Borrowed from English 'after dark', used as a noun in Japanese to refer to evening clothing.