dressy
adjective uk/ˈdres.i/ us/ˈdres.i/
（服装）正式的，适合正式场合的
Dressy clothes are suitable for formal occasions.
I need something a bit more dressy for the wedding. 去参加婚礼我得穿得正式点儿。
（场合）需着正装的
A dressy occasion is one at which people wear very formal clothes.
a dressy affair/occasion 需穿正装的活动／场合