Origin of sirloinEarly Modern English surloyn from Middle French surlonge from Old French sur, over (see sur-) + loigne, loin
Origin of sirloinMiddle English surloine from Old French surlonge, *surloigne sur above ( from Latin super ; see uper in Indo-European roots.) longe, loigne loin ; see loin .
(countable and uncountable, plural sirloins)
- (US) A cut of beef from the lower part of the back, where the last ribs are (called rump in UK English).
- (UK) A cut of beef from the middle of the back (corresponding to short loin and partly rib in US English).