noun (n)

• the branch of medical science that treats disease or injury by operative procedures(noun.cognition)

  Example:
  He is professor of surgery at the Harvard Medical School.
  

  source: wordnet30
• a room where a doctor or dentist can be consulted(noun.artifact)

  Example:
  He read the warning in the doctor's surgery.
  

  source: wordnet30
• a room in a hospital equipped for the performance of surgical operations(noun.artifact)

  Synonym:
  operating room, operating theater, operating theatre, or
  

  source: wordnet30
• a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body(noun.act)

  Example:
  He died while undergoing surgery.
  

  Synonym:
  operation, surgical operation, surgical procedure, surgical process
  

  source: wordnet30
• The art of healing by manual operation; that branch of medical science which treats of manual operations for the healing of diseases or injuries of the body; that branch of medical science which has for its object the cure of local injuries or diseases, as wounds or fractures, tumors, etc., whether by manual operation or by medicines and constitutional treatment.(noun)

  source: webster1913