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Synonyms

fanatical

American  
[fuh-nat-i-kuhl] / fəˈnæt ɪ kəl /

adjective

  1. motivated or characterized by an extreme, uncritical enthusiasm or zeal, as in religion or politics.

    Synonyms:
    rabid, frenzied, zealous, enthusiastic

fanatical British  
/ fəˈnætɪkəl /

adjective

  1. surpassing what is normal or accepted in enthusiasm for or belief in something; excessively or unusually dedicated or devoted

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

What does fanatical mean? Fanatical means having and being motivated by an extreme and often unquestioning enthusiasm, devotion, or zeal for something, such as a religion, political stance, or cause. A person who shows such extreme enthusiasm or devotion is called a fanatic. Sometimes, fanatic is used negatively to imply that someone takes such devotion too far, as in They’re considered religious fanatics due to their extreme practices. Close synonyms are extremist, radical, and zealot. Other times, fanatic is not used negatively but instead simply refers to someone who is extreme in their devotion or enthusiasm for an interest or hobby. For example, calling someone a sports fanatic means they’re an extremely enthusiastic fan of sports. In fact, the word fan is a shortening of fanatic. Fanatical can be used to describe either a kind of fanatic or such a person’s beliefs or behavior. Example: We dismiss these extreme beliefs by calling them fanatical, but they may be more widespread than we think.

Related Words

See intolerant, radical.

Other Word Forms

Etymology

Origin of fanatical

First recorded in 1540–50; fanatic + -al 1

Explanation

If you are excessively enthusiastic about something — a sports team, an actor, your religion, saving the whales, a certain brand of chocolate — then you are fanatical about it. Fanatical comes from the word fanatic, which itself came from the Latin fanaticus, meaning "mad" or "inspired by a deity." The root word is fanum, or "temple." The original English meanings of both fanatic and fanatical implied that the person being described was insane with enthusiasm, like a religious zealot. The word fan is likely shortened from fanatic, and thus shares the same roots, but that word doesn't imply the same obsessiveness that fanatical does.

Keep Reading on Vocabulary.com

Vocabulary lists containing fanatical

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But in Erin Lee Carr’s Hulu whodunnit documentary, "Fanatical: The Catfishing of Tegan and Sara," their fans' closeness began creepily bordering on something else.

From Salon • Oct. 18, 2024

Fanatical as a trainer and invariably the first to arrive and the last to leave, Haaland is aware of the need to immerse himself in the necessary rigours required.

From BBC • May 9, 2023

Fanatical ideas can lead to real, even deadly harm.

From Washington Post • Jan. 11, 2021

Fanatical holiday decor along a street of row houses in Baltimore’s Hampden neighborhood is one of the most extravagant light displays anywhere.

From Washington Times • Dec. 20, 2017

It was a question in their minds who was right, Dr. Pusey, or this "Fanatical Revivalist."

From From Death into Life or, twenty years of my minstry by Haslam, William