Learner's definition of ANESTHESIA
loss of feeling in a person's body or part of the body through the use of drugs
The patient was given an injection to induce anesthesia.
patients who are under general anesthesia [=patients who have been given drugs that make them unconscious and unable to feel pain]
The doctor removed the mole while the patient was under local anesthesia. [=the patient had been given drugs that took away feeling in only the part of the body where the doctor worked]