cosplaynoun [ U ]
uk/ˈkɒz.pleɪ//ˈkɑːz.pleɪ/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.
cosplayverb [ I ]
/ˈkɒz.pleɪ//ˈkɑːz.pleɪ/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.
cosplayer
noun [ C ] /ˈkɒz.pleɪ.ə//ˈkɑːz.pleɪ.ɚ/
Hundreds of cosplayers in elaborate costumes attended the event.