1 Of or relating to the function of the mind through which one is aware of mental experiences such as perceptions, thoughts, emotions, and wishes. In psychoanalysis, functioning as a noun (the conscious), denoting the conscious mind. See also consciousness. Compare unconscious (1).
2 Awake, alert, and aware of what is happening in the immediate vicinity; not in a state of sleep, trance, or coma.
3 Aware of and giving due weight to something, as in Are you conscious of the need for action? or I am not at all clothes-conscious. [From Latin conscius sharing knowledge, from con with + scire to know]