unconscious unconscious /ˌənˈkɑːnʃəs/

adjective

1. () Not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead  ( unconscious )
   not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead
    Lay unconscious on the floor
   lay unconscious on the floor
   
2. () (followed by 'of') not knowing or perceiving  ( unconscious )
   (followed by 'of') not knowing or perceiving
    Happily unconscious of the new calamity at home
   happily unconscious of the new calamity at home
   
3. () Without conscious volition  ( unconscious )
   without conscious volition
   

noun

1. () That part of the mind wherein psychic activity takes place of which the person is unaware  ( unconscious mind , unconscious )
   that part of the mind wherein psychic activity takes place of which the person is unaware