semiformal

adj.半正式的

I had never been to a semiformal dance before, and now was my chance. 我以前从没有参加过这种半正式的舞会，这次可是我的机会。

A man's dress jacket,usually black with satin or grosgrain lapels,worn for formal or semiformal occasions. 夜小礼服、晚餐服男式的礼服外套，通常是黑色，有亚麻的或粗丝绸的翻领，在正式或半正式场合穿着

A man's dress jacket, usually black with satin or grosgrain lapels, worn for formal or semiformal occasions. 夜小礼服、晚餐服男式的礼服外套，通常是黑色，有亚麻的或粗丝绸的翻领，在正式或半正式场合穿着

For formal or semiformal functions, conventional or modified versions of national dress will be suitable. 在正式或半正式场合，最好穿正规或稍微改变的民族服装。

he wore semiformal attire; a black-tie dinner. 他穿着半正式的服装；要求穿半正式服装的宴会。