noun, plural gai·e·ties.
- the state of being joyous, vivacious, or cheerful.
- Often gaieties. merrymaking or festivity: the gaieties of the New Year season.
- showiness; finery: gaiety of dress.
noun plural -ties
- the state or condition of being merry, bright, or lively
- festivity; merrymaking
1630s, from French gaieté, from gai “gay” (see gay). In the 1890s, especially with reference to a London theater of that name, and the kind of musical shows and dancing girls found there.