To surrender unconditionally.

(Marxism) labour performed in excess of the labour necessary to produce the means of livelihood of the worker

(military) The ranking surgeon of a regiment in the British Commonwealth

(vector calculus) a surface that Gauss' law is applied to

A local government district with borough status of Surrey, England, formed in 1974, with its headquarters in Camberley

cosmetic surgery

(surgery) A surgical operation on the heart while a machine keeps the blood flowing.

plural of surplus value

(geometry) A compact Riemann surface with precisely 84(g − 1) automorphisms, where g is the genus of the surface. This number is maximal by virtue of Hurwitz's theorem on automorphisms.

Used other than figuratively or idiomatically: see sure. / (usually sarcastic) Used to emphasise an apology, acknowledgement, etc.