narcose UK /nɑːˈkəʊs/US /nɑɹˈkoʊs/noun 1verb 1forms 3 noun1 •(no longer used, rare) The state of being under narcosis; unconsciousness.Persons affected with an idiosyncrasy against this particular substance, and neurasthenic sufferers may easily be seized with a vomituritive tendency after the expiration of the narcose […] — 1889 verb1 •(rare) To place in a state of narcosis; to narcotize.He then used only 1,250 p. p. m., and although none died, four out of five were depressed and irritated or narcosed. — 1936 formsnarcosed · narcosing · narcoses