fanaticism Meaning, Definition & Usage

  1. noun excessive intolerance of opposing views
    fanatism; zealotry.

WordNet

Fa*nat"i*cism noun
Etymology
Cf. Fanatism.
Definitions
  1. Excessive enthusiasm, unreasoning zeal, or wild and extravagant notions, on any subject, especially religion; religious frenzy. and politics, terrorism Syn. -- See Superstition.

Webster 1913