Pertaining to, or indicating, fanaticism; extravagant in opinions; ultra; unreasonable; excessively enthusiastic, especially on religious subjects; as, fanatic zeal; fanatic notions.
A person affected by excessive enthusiasm, particularly on religious subjects; one who indulges wild and extravagant notions of religion.
A person who has unreasonably strong beliefs in or enthusiasm for something. A fanatic often does things that are excessive and may be contrary to the mores and laws of society. back
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"--Winston Churchill
marked by excessive enthusiasm for and intense devotion to a cause or idea; "rabid isolationist"
a person filled with excessive, uncritical zeal, particularly for an extreme religious or political cause
a person who cannot talk about anything else and wont change the subject
a person whose extreme enthusiasm, interest, zeal, etc
a person who won't change his mind and can't change the subject
a person with intense enthusiasms or devotion to a cause