fanaticism

noun

fa·​nat·​i·​cism fə-ˈna-tə-ˌsi-zəm 

: fanatic outlook or behavior

Examples of fanaticism in a Sentence

Recent Examples on the Web

While the tone and formula hasn’t changed too drastically, the movies do not earn as much money or inspire the same fanaticism. —Andrew McGowan, Variety, 8 Aug. 2025

Toll hit on many of the same themes, outlining the fanaticism of the Japanese military and threats of a coup if their leaders tried to pursue peace. —Brady Knox, The Washington Examiner, 7 Aug. 2025

Advertisement This methodical approach to murder highlights the cult’s cold precision and the extent of their fanaticism. —Isabella Wandermurem, Time, 25 July 2025

But this is more than just a narrative of the event—Holley also explores the fanaticism of the online sleuths who have spent years trying to solve this case. —Longreads, 27 June 2025

Word History

First Known Use

1652, in the meaning defined above

Rhymes for fanaticism

• activism
• ageism
• albinism
• altruism
• aneurism
• animism
• aphorism
• atomism
• barbarism
• bolshevism
• botulism
• brahmanism

Medical Definition

fanaticism

noun

fa·​nat·​i·​cism fə-ˈnat-ə-ˌsiz-əm 

: fanatic outlook or behavior especially as exhibited by excessive enthusiasm, unreasoning zeal, or wild and extravagant notions on some subject