ˌfancy ˈdress BrE AmE noun [uncountable] British English
clothes that you wear, especially to parties, that make you look like a famous person, a character from a story etc:
an invitation to a fancy-dress party
ˌfancy ˈdress BrE AmE noun [uncountable] British English
clothes that you wear, especially to parties, that make you look like a famous person, a character from a story etc:
an invitation to a fancy-dress party
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012