舞會 (large formal social gathering for dancing) [C]：a～at the palace 宮廷里的舞會;The banquet was followed by a～.宴會后是舞會。
have (oneself) a ball 痛快地玩 (infml)(尤AmE)：Have a～on your vacation/at the beach.假期/在海灘上痛快玩玩!
→′ballroom n 舞廳;
【辨異】 ball和dance都可指“舞會”。但ball指隆重的大型正式舞會;dance則指通常的非正式舞會。