/ Dictionary / Index S subregion: Meaning and Definition of Find definitions for: sub•re•gion Pronunciation: (sub'rē"jun), [key] — n. a division or subdivision of a region, esp. a division of a zoogeographical region. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subrational subreption Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language