ˈtheme ˌparty BrE AmE noun [countable]
British English a party where everyone has to dress in a particular way connected with a particular subject:
a Wild West theme party
ˈtheme ˌparty BrE AmE noun [countable]
British English a party where everyone has to dress in a particular way connected with a particular subject:
a Wild West theme party
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012