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Synonyms

extremist

American  
[ik-stree-mist] / ɪkˈstri mɪst /

noun

extremists plural
  1. a person who goes to extremes, especially in political matters.

  2. a supporter or advocate of extreme doctrines or practices.


adjective

  1. belonging or pertaining to extremists.

extremist British  
/ ɪkˈstriːmɪst /

noun

  1. a person who favours or resorts to immoderate, uncompromising, or fanatical methods or behaviour, esp in being politically radical

"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

adjective

  1. of, relating to, or characterized by immoderate or excessive actions, opinions, etc

"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

Other Word Forms

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of extremist

First recorded in 1840–50; extreme + -ist

Explanation

Nowadays, we tend to associate the word extremist with "terrorist," and use the two words almost interchangeably to define someone who holds radical political or religious views. An extremist can hold views on any subject: if you believe all little brothers should be banned from their siblings' rooms, or that anyone who roots for a different baseball team should be quarantined, then you, my friend, are an extremist. What tends to unite all extremists is their willingness to act, often violently, to realize their beliefs. Little brothers, watch out.

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Vocabulary lists containing extremist

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.

And psychologists and psychiatrists say kids, in their formative years, could easily see extremist content online and, in some cases, possibly connect with extremist groups in search of social belonging.

From Los Angeles Times • May 23, 2026

Researchers are finding that extremist ideas are now spreading through looser networks where many voices contribute and messaging can vary widely.

From Salon • May 8, 2026

"Anything that creates, like an agitation, in the extremist on either side of the aisle is a frightening dynamic," Griffin said.

From BBC • May 6, 2026

The center denounced F-42 as an extremist with one hand and paid him $140,000 with the other, according to the indictment.

From The Wall Street Journal • Apr. 30, 2026

In fact, I am, and always have been, an extremist, a purist.

From The Book of Khalid by Rihani, Ameen Fares

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