/ Dictionary / Index R radicalize: Meaning and Definition of Find definitions for: rad•i•cal•ize Pronunciation: (rad'i-ku-līz"), [key] — v., -ized, -iz•ing. —v.t. to make radical or more radical, esp. in politics. —v.i. to become radical or more radical, esp. in politics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: radicalize (Thesaurus) radicalism radical left Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language