the hobby of dressing as and pretending to be a character from a film, TV programme, comic book, etc.

This Star Trek tunic is perfect for cosplay or conventions. 这条《星际迷航》束腰短袍用来参加角色装扮活动或大会是最合适的了。

to dress as and pretend to be a character from a film, TV programme, comic book etc., as a hobby

They cosplay as videogame characters. 他们装扮电子游戏中的角色。