gaiety /ˈɡeiəti/ n. [u] 快乐，高兴：She felt, without knowing why, that the gaiety was assumed.不知为什么她觉得这种快乐是装出来的。He seemed to be a part of the gaiety, having a wonderful time.他似乎已融入到庆祝活动中，玩得高兴极了。