Breadcrumb Home > Dictionary > Index B Bion: Meaning and Definition of Find definitions for: Bi•on Pronunciation: (bī'on), [key] — n. fl. c100 b.c., Greek pastoral poet. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. biomorph bionic ✖ Related Content Daily Word Quiz: tendentious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language