typo: should be comatose.
meaning: being in a coma.
If you mean "comatose", then it comes from the Greek "koma", meaning "a state of deep sleep". "Comatose" means "in a state of prolonged uncousnciousness with varying degrees of reaction to outside stimuli". The several degrees of a coma can be measured in the Glasgow scale and measure how and if a patient responds to stimuli to various senses. Generally, comatose patinets cannot hear or see the world around them, though they may feel pain and even respond to certain actions, such as grasping objects placed in their hands.