semidressy en · ADJ
Etymology
From semi- + dressy.
Meanings
-
(not-comparable) Somewhat or partly dressy.
Not sure if this is a semicasual or semidressy event? Choose a nice dress or a semidressy pair of pants, throw a nice jacket on top of it, and voilà! You're dressed for both parties.
2016, Katie Martin, The Mother of the Bride Guide, page 128: