(medicine) A procedure involving major incisions to remove, repair, or replace a part of a body. / (medicine) The medical specialty related to the performance of surgical procedures.

plural of surgery

(medicine) Surgery using a fibre-optic laparoscope through a small incision, either for examination or treatment

Surgery on any part of the nervous system, especially the brain; neurosurgery. / (uncountable, idiomatic) Something that is overly complex, detailed or confusing.

Surgery (and related medical treatment) to improve appearance rather than for health reasons.

Surgery to repair body parts, especially involving the transfer of tissue. / Cosmetic surgery for appearance.

laparoscopy

(surgery, military, colloquial) Surgery performed rapidly in a military field hospital to stabilize the patient as quickly as possible.

(topology) The removal of a solid torus from a 3-dimensional manifold, followed by its being replaced via a homeomorphism of its boundary.

Anything overly complex, detailed or confusing.