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).