cosplay: meaning and definitions

this sense?) (countable) A costume that imitates a (usually fictional) character, especially from Japanese media (such as manga, anime, tokusatsu, video games, and Japanese pop music bands).

this sense?) (uncountable) The subculture centered on people wearing such costumes.

The art or practice of costuming oneself as a (usually fictional) character.

this sense?) A skit or instance of such play.

To costume oneself as (a character).