extremism

noun

ex·​trem·​ism ik-ˈstrē-ˌmi-zəm 

1

: the quality or state of being extreme

2

: advocacy of extreme measures or views : radicalism

extremist

ik-ˈstrē-mist 

noun or adjective

Examples of extremism in a Sentence

Recent Examples on the Web

Will Carless covers extremism and emerging issues for USA TODAY. —USA Today, 8 Mar. 2026

His opponent James Fishback — a relative political unknown who has used racist and white nationalist rhetoric throughout his campaign — is highlighting the generational divide around extremism on the right in Florida. —Claire Heddles, Miami Herald, 5 Mar. 2026

Beirich is the co-founder of the Global Project Against Hate and Extremism, an organization focused on shaping policies to combat online extremism and holding tech companies accountable. —Natalie Eilbert, jsonline.com, 5 Mar. 2026

On Wednesday, the Spanish leader also referenced the Iraq war and its negative consequences in terms of generating more jihadi extremism. —ABC News, 4 Mar. 2026

Word History

First Known Use

1865, in the meaning defined at sense 1

Rhymes for extremism

• endemism

Kids Definition

extremism

noun

ex·​trem·​ism ik-ˈstrē-ˌmiz-əm 

1

: the quality or state of being extreme

2

: belief in and support for extreme ideas especially in politics

extremist

-məst 

noun or adjective