English Reference
noun · adjective

extremist

n. · adj.
US /ɛkˈstɹimɪst/ UK /ɛkstɹˈiːmɪst/ ex·trem·ist UK spelling extremist's, extremist's

  1. 01 C1 Advanced AcademicFormal

    n.someone who holds very strong and often dangerous political or religious views.

    n.a person who advocates for radical or fanatical measures, often rejecting democratic or moderate processes.

    Simple

    The government is worried about how extremists use the internet to spread their ideas.

    In context

    Political analysts warned that the rise of extremists on both ends of the spectrum could destabilize the fragile coalition government.

    Usage

    Often used with 'religious' or 'political' as a modifier.

  2. 02 C1 Advanced AcademicFormal

    adj.describing a person or group that has very radical or fanatical opinions.

    adj.characterized by or relating to extremism; holding views that are far outside the mainstream.

    Simple

    The group was banned for its extremist views on social media.

    In context

    The candidate struggled to distance himself from the extremist rhetoric that had defined his early career in local politics.

Essentially, the US (and their allies, including Britain) abandoned the country to the Taliban extremists.

The Guardian· 17 Aug 2026

Our new national survey shows why it's so effective, and why it's more dangerous than any single extremist ideology, precisely because it doesn't lead just one way.

Phys.org· 17 Aug 2026

From extreme + -ist.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated