Noun | 1. | ![]() surgical operation, surgical procedure, surgical process, surgery, operation - a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body; "they will schedule the operation as soon as an operating room is available"; "he died while undergoing surgery" stoma - a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ) |