1ADJ [usually ADJ n](社交场合)穿晚礼服的,正式的 A black tie event is a formal social event such as a party at which people wear formal clothes called evening dress. (社交场合)穿晚礼服的,正式的
...a black-tie dinner for former students.
老同学正式晚宴
2N-UNCOUNT 男式晚礼服 If a man is dressed in black tie, he is wearing formal evening dress, which includes a dinner jacket or tuxedo and a bow tie. 男式晚礼服