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

Examples of fanaticism in a Sentence

Recent Examples on the Web There’s the religious fanaticism of recent nunsploitation movies, as well as the Zodiac Killer-style messages, written in cryptic runes that are indecipherable except for the signature: Longlegs. Peter Debruge, Variety, 6 July 2024 At the beginning of the coronavirus pandemic, U.S. observers were quick to blame Iran’s inability to control the outbreak on a combination of fanaticism and incompetence. Mohammad Ayatollahi Tabaar, Foreign Affairs, 20 Oct. 2020 Since the show’s inception in 2019, The Boys has been a superhero allegory about Trump, dangerous authoritarianism, political fanaticism, Nazis, and America’s sway toward fascism. Alex Abad-Santos, Vox, 25 June 2024 Podcasts had been popular before, but this investigation into Adnan Syed, who was imprisoned for the murder of his ex-girlfriend Hae Min Lee, is where true true crime podcast fanaticism was born. Staff Author,, 16 June 2024 See all Example Sentences for fanaticism 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'fanaticism.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1652, in the meaning defined above

Time Traveler
The first known use of fanaticism was in 1652

Dictionary Entries Near fanaticism

Cite this Entry

“Fanaticism.” Dictionary, Merriam-Webster, Accessed 24 Jul. 2024.

Medical Definition


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
Last Updated: - Updated example sentences
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