What is the definition or description of: general anesthesia?

Induced coma: General anesthesia is a medically induced coma and loss of protective reflexes resulting from the administration of one or more general anesthetic agents. It is a treatment that renders you unconscious during medical procedures, so you don't feel or remember anything that happens.

Loss of sensation: General anesthesia is a reversible state of suspended animation characterized by amnesia (loss of memory), analgesia (loss of pain sensation) and loss of consciousness.

ADA definition: A drug-induced loss of consciousness during which patients are not a rousable, even by painful stimulation. The ability to independently maintain ventilatory function is often impaired. Patients often require assistance in maintaining a patent airway, and positive pressure ventilation may be required because of depressed spontaneous ventilation or drug induced depression of neuromuscular function.

Hard to say : As anesthesia is a continuum of moderate to deep sedation onto general anesthesia. Basically its where airway cannot be maintained w/o help and one's blood pressure and pulse may need to be supported too. I've included a guideline: http://www.Sgna.Org/issues/sedationfactsorg/sedationadministration/sedationlevels.Aspx.

Unconscious: Is its fullest sense is where a patient is unconscious and insensate to pain. Depending on the surgery involved the patient maybe paralyzed and intubated and on a respirator.

See below: General anesthesia is the induction of unconsciousness with the absence of pain throughout the entire body.