Fa·nat·ic·al a. Characteristic of, or relating to, fanaticism; fanatic. -Fa*nat*ic*al*ly, adv. -- Fa*nat*ic*al*ness, n.
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fanatical
adj : marked by excessive enthusiasm for and intense devotion to a
cause or idea; "rabid isolationist" [syn: fanatic, overzealous,
rabid]