A fan, or fanatic, sometimes also termed aficionado or supporter, is a person who is enthusiastically devoted to something or somebody, such as a band, a sports team, a genre, a politician, a book, a movie or an entertainer.
Collectively, the fans of a particular object or person constitute its fanbase or fandom.
Fans usually have a strong enough interest that some changes in their lifestyles are made to accommodate devotion to the focal object.
Fans have a desire for external involvement – they are motivated to demonstrate their involvement with the area of interest through certain behaviors (attending conventions, posting online, displaying team banners outside their homes, etc.).
The groupie is an example, a fan of a particular band or musician, who will follow them on concert tours.
The degree of devotion to celebrities can range from a simple crush to the deluded belief that they have a special relationship with the star which does not exist.
In Japan, the term is normally derogatory, a connotation lacking in English, where it generally refers to people in the anime and manga fandom.
People who approve of or associate themselves with certain politicians or political groups are generally called "supporters" rather than "fans", although there are politicians with official or unofficial "fan clubs".
In contrast, a "smark" is a fan who recognizes that they are witnessing a stage-managed work ("kayfabe"), but appreciates it nonetheless, including its backstage aspects.Fans often have a "wish to acquire" material objects related to the area of interest, such as a baseball hit by a famous slugger or a used guitar pick from their musical hero.As well, some fans have a desire for social interaction with other fans.Merriam-Webster, the Oxford dictionary and other sources define "fan" as a shortened version of the word fanatic.Fanatic itself, introduced into English around 1550, means "marked by excessive enthusiasm and often intense uncritical devotion".