fanaticism

noun

fa·​nat·​i·​cism fə-ˈna-tə-ˌsi-zəm How to pronounce fanaticism (audio)
Synonyms of fanaticismnext
: fanatic outlook or behavior

Examples of fanaticism in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Even after the glow of the Cup has faded, opportunities to plug into Scotland’s football fanaticism will continue. — Laura Dannen Redman, Condé Nast Traveler, 28 May 2026 By the way they’re subtly disparaged for not being financially irresponsible to declare their fanaticism. — Marcus Thompson Ii, New York Times, 13 June 2026 In Paul’s time, Josephus was a perfect instance of the first kind, a brilliant military leader who, when faced with the fanaticism of his cohorts, chose to shift his allegiance to Rome. — Adam Gopnik, New Yorker, 13 Apr. 2026 But the beauty of the beautiful game is that millions of dollars and people don’t guarantee success, that there’s a difference between a soccer-playing nation and a soccer nation, that passion and culture and fanaticism matter. — Mark Zeigler, San Diego Union-Tribune, 9 June 2026 See All Example Sentences for fanaticism

Word History

First Known Use

1652, in the meaning defined above

Time Traveler
The first known use of fanaticism was in 1652

Rhymes for fanaticism

See All Rhymes for fanaticism

Browse Nearby Words

fanatic
fanaticism
fanaticize
See all Nearby Words

Cite this Entry

“Fanaticism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fanaticism. Accessed 7 Jul. 2026.

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Medical Definition

fanaticism

noun
fa·​nat·​i·​cism fə-ˈnat-ə-ˌsiz-əm How to pronounce fanaticism (audio)
: fanatic outlook or behavior especially as exhibited by excessive enthusiasm, unreasoning zeal, or wild and extravagant notions on some subject
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