From Longman Dictionary of Contemporary Englishsoireesoi‧ree, soirée /ˈswɑːreɪ $ swɑːˈreɪ/ noun [countable] DLa formal or fashionable evening party
Examples from the Corpus
soiree• Harvard professor Cornel West arrived at the Corcoran soiree in his signature three-piece suit and Frenchcuffed shirt.• Jules had been intent on taking me to Marie's soiree, and I still didn't know why.• It was perfumed with a scent I remembered from the soiree.Origin soiree (1700-1800) French soirée, from soir “evening” 