verb (used with object), rad·i·cal·ized, rad·i·cal·iz·ing.

to make radical or more radical, as in politics: young people who are being radicalized by extremist philosophies.

verb (used without object), rad·i·cal·ized, rad·i·cal·iz·ing.

to become radical or more radical: The regime has increasingly radicalized since the coup.

Nearby words

  1. radical mastectomy,
  2. radical right,
  3. radical sign,
  4. radicalism,
  5. radicality,
  6. radically,
  7. radicand,
  8. radicant,
  9. radicchio,
  10. radicel

Also especially British, rad·i·cal·ise.

Origin of radicalize

First recorded in 1815–20; radical + -ize

Related formsrad·i·cal·i·za·tion, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for radicalised



verb (tr)

to make (a person) more radical
Derived Formsradicalization or radicalisation, noun

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

Word Origin and History for radicalised



1820, from radical (adj.) + -ize. Related: Radicalized; radicalizing.

Online Etymology Dictionary, © 2010 Douglas Harper