Definition of sirloin noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈsɜːlɔɪn//
; NAmE NAmE//ˈsɜːrlɔɪn//
(also sirloin steak)[uncountable, countable]
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good quality beef that is cut from a cow’s back Word Origin late Middle English: from Old French (from sur- ‘above’ + loin).
See the Oxford Advanced American Dictionary entry: sirloin