/ Dictionary / Index R radicalize: Meaning and Definition of Find definitions for: rad•i•cal•ize Pronunciation: (rad'i-ku-l?z"), [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: abdicate Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language