medical Definition of Glasgow Coma Scale
: a scale that is used to assess the severity of a brain injury, that consists of values from 3 to 15 obtained by summing the ratings assigned to three variables depending on whether and how the patient responds to certain standard stimuli by opening the eyes, giving a verbal response, and giving a motor response, and that for a low score (as 3 to 5) indicates a poor chance of recovery and for a high score (as 8 to 15) indicates a good chance of recovery
