1. Knowing and perceiving; having awareness of surroundings and sensations and thoughts
   "became conscious that he was being followed"; "remained conscious during the operation"; "conscious of his faults"
    
2. Intentionally conceived
   "a conscious policy";
   - witting
    
3. (followed by ‘of’) showing realization or recognition of something
   "the careful tread of one conscious of his alcoholic load"; "few voters seem conscious of the issue's importance"; "conscious of having succeeded"

See also: awake, aware, cognisant [Brit], cognizant, intended, self-aware, self-conscious, semiconscious, sensible, sensitive, sentient, voluntary

Antonym: unconscious

Encyclopedia: Conscious