舞会 (large formal social gathering for dancing) [C]：a～at the palace 宫廷里的舞会;The banquet was followed by a～.宴会后是舞会。

have (oneself) a ball 痛快地玩 (infml)(尤AmE)：Have a～on your vacation/at the beach.假期/在海滩上痛快玩玩!

→′ballroom n 舞厅;

【辨异】 ball和dance都可指“舞会”。但ball指隆重的大型正式舞会;dance则指通常的非正式舞会。