WordNet sense 1 (that part of the mind wherein psychic activity takes place of which the person is unaware):

unconscious mind

WordNet sense 2 (not subject to the control of the will):

nonvoluntary, unvoluntary

WordNet sense 3 (just below the level of consciousness):

subconscious

WordNet sense 4 (concerning mental functioning that is not represented in consciousness):

nonconscious

WordNet sense 5 (knocked unconscious by a heavy blow):

out, stunned

WordNet sense 6 (unresponsive to stimulation):

insensible, senseless

WordNet sense 7 (in a state of deep and usually prolonged unconsciousness; unable to respond to external stimuli):

comatose

WordNet sense 8 (unconscious from a blow or shock or intoxication):

cold

WordNet sense 9 ((often followed by `of') not aware):

unaware, incognizant