Operation
Part of speech: noun
Definition: The method by which a device performs its function. The method or practice by which actions are done. A planned undertaking. A business or organization. a surgical procedure. a procedure for generating a value from one or more other values (the operands; the value for any particular operands is unique) a military campaign (w:Operation Desert Storm)
Surgery
Part of speech: noun
Definition: A procedure involving major incisions to remove, repair, or replace a part of a body.The medical specialty related to the performance of surgical procedures.A room or department where surgery is performed.A doctor's consulting room.Any arrangement where people arrive and wait for an interview with certain people, similar to a doctor's surgery.A pre-packaged bankruptcy or "quick bankruptcy".