1. a person who dresses up as a character from a movie, TV show, video game, comic book, or other fictional work, typically at conventions or events
Usage: informal; from 'costume play'

Examples

• The cosplayer won first prize for her detailed Harley Quinn costume at the comic convention.
• Many cosplayers spend months preparing their outfits for the annual anime festival.
• He became a popular cosplayer on social media by recreating characters from popular video games.
• The convention featured hundreds of cosplayers dressed as superheroes and anime characters.
• She started as a casual cosplayer but now creates professional-quality costumes for competitions.
• Cosplayers gathered in the main hall to take photos together before the costume contest began.