A short form of the word, Fan, means a person who loves a hobby, a sport (often a team), music, a kind of movie or book, or almost anything. These people mostly do not try to hurt people. This word is used in American English. There are lots of kinds of fans, including science fiction fans and fans of popular music stars, like The Beatles. Fans will meet with each other to talk about and share their interest, often in large groups called conventions.