Definition of unconsciousness noun from the Oxford Advanced Learner's Dictionary

 

unconsciousness

 noun
noun
BrE BrE//ʌnˈkɒnʃəsnəs//
 
; NAmE NAmE//ʌnˈkɑːnʃəsnəs//
 
[uncountable] Injuries
 
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a state like sleep caused by injury or illness, when you are unable to use your senses He had lapsed into unconsciousness. See related entries: Injuries
See the Oxford Advanced American Dictionary entry: unconsciousness