Definition of comatose adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈkəʊmətəʊs//
    ; NAmE NAmE//ˈkoʊmətoʊs//
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  1. 1(medical) deeply unconscious; in a coma
  2. 2(humorous) extremely tired and lacking in energy; sleeping deeply See related entries: Tiredness
  3. Word Origin late 17th cent.: from Greek kōma, kōmat- ‘deep sleep’ + -ose.
See the Oxford Advanced American Dictionary entry: comatose