Dressing up as a character from anime, manga, video games, etc. Abbreviation of コスチュームプレー.
She cosplayed as her favorite anime character.
I enjoyed cosplay at the weekend event.
She is cosplaying an anime character.
Everyone took photos in their cosplay costumes.
I'm planning to attend a cosplay event with friends next month.
コスプレ names the hobby or act of dressing up as a character, while コスチューム is the physical outfit itself that one wears to do コスプレ.
cosplayer
cosplay show
cosplay dance party
cosplay dance party
Abbreviation of コスチュームプレー, from English 'costume play'.