Dictionary.com
definitions

baron of beef

noun Chiefly British.
  1. a joint of beef consisting of the two sirloins joined at the backbone; double sirloin.Compare baron(def 4).

Origin of baron of beef

First recorded in 1745–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for baron of beef

baron of beef

noun
  1. a cut of beef consisting of a double sirloin joined at the backbone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012