/ Dictionary / Index B bunion: Meaning and Definition of Find definitions for: bun•ion Pronunciation: (bun'yun), [key] — n. Podiatry. inflammation of the synovial bursa of the great toe, usually resulting in enlargement of the joint and lateral displacement of the toe. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bunion (Thesaurus) Bunin bunionette Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language