One who has an intense, obsessive interest in something.
A member of a subculture revolving around intellectualism, video games, fantasy and science fiction, comic books and assorted media.
A person who is intellectual but generally introverted.
A serious, enthusiastic consumer: not professional (earning money), but of similar interest and skills to a (generally lower level) professional, or aspiring to such. The target market of prosumer equipment.
A person in postindustrial society who combines the economic roles of producer and consumer
Targeted at serious, enthusiastic consumers, incorporating professional features but often modified for non-professional use.
high-end