/ Dictionary / Index I illegalize: Meaning and Definition of Find definitions for: il•le•gal•ize Pronunciation: (i-lē'gu-līz"), [key] — -ized, -iz•ing. to make illegal: They even wanted to illegalize smoking. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: illegalize (Thesaurus) illegality illegal procedure Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language