Définitions cosplay Dictionnaire de français LarousseExplain cosplay in simple terms. Costume play refers to dressing up and pretending to be a particular character from an video game. This trend has immensely popular amongst enthusiasts of nerd subculture globally. People thoroughly create outfits and accessories to accurately portray their favorite characters. Cosplayers commonly attend conventions or costume play events, where they can display their artistry and network with others who share the same passion. In the end, cosplay is an manifestation of admiration and commitment for a fictional character and a love for the nerd community.