cosplay UK /ˈkɒz.pleɪ/US /ˈkɑz.pleɪ/verb 4noun 2forms 3 verb4 •To costume oneself as a (usually fictional) character.She cosplayed at the manga convention. •To costume oneself as (a [usually fictional] character).She cosplayed Sailor Moon at the manga convention. •(disapproving, figurative) To adopt the behavior and mannerisms of another; to pretend to be someone or something.“He’s cosplaying as a goober,” one local [Mike Holcomb] memorably put it on Twitter. — 2018 •(disapproving, figurative) To adopt the behavior and mannerisms of (another); to pretend to be (someone or something).Why has the Russian Federation decided to cosplay the Nazi Third Reich by attacking the peaceful neighboring state and plunging the region into war? — 2022 noun2 •The art or practice of costuming oneself as a (usually fictional) character.Also the popularity can be seen in doujinshi and cosplay (costume play) and the popularity is not just junior high girls. — 1993 •A skit or instance of this art or practice.Central to the activity of cosplay is elaborate costuming, though some cosplays are enacted using a game system. — 2010 formscosplayed · cosplaying · cosplays