/ Dictionary / Index B beefsteak begonia: Meaning and Definition of Find definitions for: beef'steak bego'nia Pronunciation: [key] an ornamental plant, Begonia erythrophylla, having light-pink flowers and nearly round, thick, fleshy leaves that are red on the underside. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. beefsteak beefsteak mushroom Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language