a state of great amusement that makes people laugh 欢闹;狂欢 The announcement was greeted with great hilarity. 公告受到了热烈的欢迎。 Their appearance caused a great deal of hilarity. 他们的出现引起了极大的欢乐。 There was much hilarity when Geoffrey steamed in ten minutes late. 杰弗里晚了十分钟才进来,大家都很开心。
Word Originlate Middle English (in the sense ‘cheerfulness’): from French hilarité, from Latin hilaritas ‘cheerfulness, merriment’, from hilaris, from Greek hilaros ‘cheerful’.