Surgery is a medical specialty that uses operative treatment, the place where surgery is performed, or the offices of the practitioner, or surgeon. Surgery may also mean:

Surgery theory, a mathematical operation used in topology; two special cases are:

Hyperbolic Dehn surgery

Surgery (politics), a regular time scheduled by a British Member of Parliament to meet with constituents to discuss their concerns and issues, and by extension in British English, other such advice sessions offered by other bodies

Dehn surgery