[mass noun]the celebration of something in a joyful and exuberant way 欢庆 the jolly festivity of the Last Night of the Proms. 伦敦逍遥音乐会最后一晚的喜乐气氛。 ■(festivities)activities or events celebrating a special occasion 庆典,庆祝活动;欢宴
语源
late Middle English: from Old French festivite or Latin festivitas, from festivus 'festive', from festum, (plural) festa 'feast'