# fanaticism

/fəˈnætəˌsɪzəm/ (US) · /fɐnˈætɪsˌɪzəm/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/fanaticism
Updated: 2026-05-30

## Definition

extreme and uncontrolled enthusiasm for a belief, idea, or activity. It often involves ignoring facts or being too focused on one thing.

For teachers: extreme and unreasoning devotion to a cause, belief, or interest. Often carries a negative connotation of irrationality or an inability to consider alternative perspectives.

## Examples

- His fanaticism for football makes him ignore the team's poor performance.
- The politician's speech was criticized for promoting fanaticism rather than encouraging a balanced debate on the new law.
- While the movement began as a call for reform, its rapid growth into fanaticism eventually led to the exclusion of any members who dared to question the central tenets.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.