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Noun: fanatic  fu'na-tik
  1. A person motivated by irrational enthusiasm (as for a cause)
    "A fanatic is one who can't change his mind and won't change the subject";
    - fiend
Adjective: fanatic  fu'na-tik
  1. Marked by excessive enthusiasm for and intense devotion to a cause or idea
    "fanatic isolationist";
    - fanatical, overzealous, rabid

Derived forms: fanatics

See also: passionate

Type of: enthusiast, partisan, partizan

Encyclopedia: Fanatic