/ Dictionary / Index B baron of beef: Meaning and Definition of Find definitions for: bar'on of beef' Pronunciation: [key] — Chiefly Brit. Chiefly Brit. a joint of beef consisting of the two sirloins joined at the backbone; double sirloin. Cf. baron (def. 4). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. baronize Barons' War Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language