Definition of "Unconscious" :

noun: that part of the mind wherein psychic activity takes place of which the person is unaware

adjective: (followed by of') not knowing or perceiving

"Happily unconscious of the new calamity at home."

adjective: not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead

"Lay unconscious on the floor."

adjective: without conscious volition