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

 

unconscious

 noun
noun
BrE BrE//ʌnˈkɒnʃəs//
 
; NAmE NAmE//ʌnˈkɑːnʃəs//
 
 
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the unconscious [singular] (psychology) the part of a person’s mind with thoughts, feelings, etc. that they are not aware of and cannot control but which can sometimes be understood by studying their behaviour or dreams compare subconscious
See the Oxford Advanced American Dictionary entry: unconscious