/ Dictionary / Index B bioregion: Meaning and Definition of Find definitions for: bi•o•re•gion Pronunciation: (bī'ō-rē"jun), [key] — n. a place, locale, or area that constitutes a natural ecological community. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bioreactor bioresearch Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language