n. The characteristic or practice of being a fanatic.
the GNU version of the Collaborative International Dictionary of English
n. Excessive enthusiasm, unreasoning zeal, or wild and extravagant notions, on any subject, especially religion, politics or ideology; religious frenzy.
The Century Dictionary and Cyclopedia
n. The character or conduct of a fanatic; inordinate zeal or bigotry; the entertainment of wild and extravagant notions, especially in regard to religion.
n.Synonyms Credulity, Bigotry, etc. See superstition.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. excessive intolerance of opposing views
Word Usage
"Religious fanaticism is the engine of Skrull imperialism! — but it delivered on little of its early promise."