rad·​i·​cal·​ism | \ ˈra-di-kə-ˌli-zəm How to pronounce radicalism (audio) \

Definition of radicalism

1 : the quality or state of being radical
2 : the doctrines or principles of radicals

Examples of radicalism in a Sentence

Recent Examples on the Web

While the Democratic House anguished over articles of impeachment and wasted time on showboat-y oversight hearings, Trump could lament their obstruction and radicalism. Chris Stirewalt, Fox News, "No, free market conservatives are not becoming Dems," 31 July 2018 That radicalism grew gradually, and then accelerated at Harvard and on other campuses across the land in the spring of 1968, when King was fatally shot in Memphis and Kennedy was slain after winning the California primary for president. Brian Macquarrie, BostonGlobe.com, "50 years later, Harvard graduates look back on year of tumult and tragedy," 19 May 2018 Given its importance for the evolution of societies, radicalism seems worth exploring. John Timmer, Ars Technica, "Political radicals don’t evaluate their own errors—about anything," 21 Dec. 2018 The results of their confidence in the dot estimating test were then compared to their tendencies toward radicalism. John Timmer, Ars Technica, "Political radicals don’t evaluate their own errors—about anything," 21 Dec. 2018 The suspect’s parents and two brothers, also known for radicalism, were detained, a judicial official said. Elaine Ganley, The Seattle Times, "Gunman from Christmas market attack in France still at large," 12 Dec. 2018 Many people view the call to abolish ICE, the Immigration and Customs Enforcement agency, as an irresponsible act of radicalism. Kathleen Frydl, Vox, "Why we should abolish ICE — and the DEA too," 14 Aug. 2018 Once he was killed, much of this was forgotten; curiously, while King’s popular image tends to forget his evolving radicalism, with Kennedy it is emphasized. Benjamin Hedin, chicagotribune.com, "50 years later: 'The Promise and the Dream' explores interrupted work of MLK and Robert Kennedy," 28 Mar. 2018 Local media reported that Education and Culture Minister Muhajir Effendy said the parade was misinterpreted and the staff of the school, located inside a local military command, had no intention to instill radicalism in children. Fox News, "Indonesian officials defend parade of veiled kids with guns," 21 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'radicalism.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of radicalism

1817, in the meaning defined at sense 1

Keep scrolling for more

Learn More about radicalism

Statistics for radicalism

Last Updated

3 Apr 2019

Look-up Popularity

Time Traveler for radicalism

The first known use of radicalism was in 1817

See more words from the same year

Keep scrolling for more

More Definitions for radicalism



English Language Learners Definition of radicalism

: the opinions and behavior of people who favor extreme changes especially in government : radical political ideas and behavior

Keep scrolling for more

More from Merriam-Webster on radicalism

Rhyming Dictionary: Words that rhyme with radicalism

Spanish Central: Translation of radicalism

Nglish: Translation of radicalism for Spanish Speakers

Britannica English: Translation of radicalism for Arabic Speakers

Comments on radicalism

What made you want to look up radicalism? Please tell us where you read or heard it (including the quote, if possible).


to affect and impair by alcohol or a drug

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!