/ Dictionary / Index R regionalize: Meaning and Definition of Find definitions for: re•gion•al•ize Pronunciation: (rē'ju-nl-īz"), [key] — -ized, -iz•ing. to separate into or arrange by regions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. regionalism Regis Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language