BLACK-TIE
Meaning of BLACK-TIE in English
ˌblack-ˈtie BrE AmE adjective
a black-tie event is one at which people wear special formal clothes, such as ↑ tuxedo s for men
⇨ white-tie
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012