A fanzine is a non-professional and non-official publication produced by enthusiasts of a particular cultural phenomenon for the pleasure of others who share their interest. The term was coined in an October 1940 science fiction fanzine by Russ Chauvenet and first popularized within science fiction fandom, and from there the term was adopted by other communities.

A fan or fanatic, sometimes also termed an aficionado or enthusiast, is a person who exhibits strong interest or admiration for something or somebody, such as a celebrity, a sport, a sports team, a genre, a politician, a book, a movie, a video game or an entertainer. Collectively, the fans of a particular object or person constitute its fanbase or fandom. They may show their enthusiasm in a variety of ways, such as by promoting the object of their interest, being members of a related fan club, holding or participating in fan conventions or writing fan mail. They may also engage in creative activities such as creating fanzines, writing fan fiction, making memes or drawing fan art.