It refers to using clothes, trinkets, props and makeup to play the roles in novels, comics and games that you like.
COS is the abbreviation of English cost, the verb is COS, and people who play COS are generally called COSER. But because this translation is the same as the role-playing game (RPG) in the game, in order to avoid the similarity, it is more accurate to say that COS is dressed in ancient costumes.
English examples. These? Die hard? Fans? Yes? Animation and comics, right? Release? Open? Their? Clothing? For what? Treat? But what? But? For what? Fun? Yes? Answer? Hobbies? What's your name? cosplay。
These loyal anime fans put on their costumes not to beg for candy, but to enjoy a hobby called "role-playing".
Fuyeor:？ I am? Shocked! ? What about you? Say you won't? Is it? Caught? Dead? Are you online? Answer? cosplay？ Clothing!
Fu Yue: What a surprise! You said you would never wear a role-playing costume!
From where? That? General? Sense? That? cosplay？ Is it? That? First of all? China? Translation? From where? Taiwan Province? It? What does it mean? Role? Play.
Generally speaking, the earliest Chinese translation of cosplay came from Taiwan Province Province, which means role-playing.
Introduction to role-playing:
Role-playing (English: role-playing), also called dress-up game. It is a social activity between people and can be carried out in any form (games, therapy, training). In the activity, participants interact by playing roles in the story world. Participants can gain happiness, experience and valuable experience by playing roles.
Role-playing can be: game entertainment, performance, real-life practice, psychological guidance, self-thinking, etc.
Reference: Baidu Encyclopedia: Role Playing