Meaning : That part of the mind wherein psychic activity takes place of which the person is unaware.
Synonyms : unconscious mind
Meaning : Not conscious. Lacking awareness and the capacity for sensory perception as if asleep or dead.
Example :
Lay unconscious on the floor.
Knowing and perceiving. Having awareness of surroundings and sensations and thoughts.
Remained conscious during the operation.Meaning : Without conscious volition.
Meaning : (followed by `of') not knowing or perceiving.
Example :
Happily unconscious of the new calamity at home.