Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of fanaticism is as below...

Fanaticism :: Fanaticism (n.) Excessive enthusiasm, unreasoning zeal, or wild and extravagant notions, on any subject, especially religion; religious frenzy..

Fanatic :: Fanatic (a.) Pertaining to, or indicating, fanaticism; extravagant in opinions; ultra; unreasonable; excessively enthusiastic, especially on religious subjects; as, fanatic zeal; fanatic notions..

Fanatism :: Fanatism (n.) Fanaticism.

Lunacy :: Lunacy (n.) A morbid suspension of good sense or judgment, as through fanaticism..

Fanatical :: Fanatical (a.) Characteristic of, or relating to, fanaticism; fanatic..

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