( US also gayety )
■ noun ( plural gaieties )
1》 the state or quality of being light-hearted and cheerful.
2》 merrymaking; festivity.
Origin
C17: from Fr. gaieté .
GAIETY
Meaning of GAIETY in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004