Definition of "Surgery" :
noun: a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body
"He died while undergoing surgery."
noun: a room in a hospital equipped for the performance of surgical operations
noun: a room where a doctor or dentist can be consulted
"He read the warning in the doctor's surgery."
noun: the branch of medical science that treats disease or injury by operative procedures
"He is professor of surgery at the Harvard Medical School."