conscious

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Characterized by or having an awareness of one's environment and one's own existence, sensations, and thoughts. synonym: aware.
• adjective Mentally perceptive or alert; awake.
• adjective Capable of thought, will, or perception.
• adjective Subjectively known or felt.
• adjective Intentionally conceived or done; deliberate.
• adjective Inwardly attentive or sensitive to something.
• adjective Showing awareness of or preoccupation with something. Often used in combination.
• noun In psychoanalysis, the component of waking awareness perceptible by a person at any given instant; consciousness.

from The Century Dictionary.

• In the state of a waking as distinguished from that of a sleeping person or an inanimate thing; in the act of feeling, or endowed with feeling, in the broadest sense of the word.
• Attributing, or capable of attributing, one's sensations, cognitions, etc., to one's self; aware of the unity of self in knowledge; aware of one's self; self-conscious.
• Having one's feelings directed toward one's self; embarrassed by one's feelings about one's own person, and by the sense of being observed and criticized by others.
• Present to consciousness; known or perceived as existing in one's self; felt: as, conscious guilt.
• Aware of an object; perceiving.
• Aware of an external object: a less correct use of the term: followed in either use by of or that, formerly by to or to one's self that.
• Aware of some element of character as belonging to one's self.
• Synonyms To be Sensible or Conscious, etc. (see feel). Aware, Conscious. Aware refers commonly to objects of perception outside of ourselves; conscious, to objects of perception within us: as, to become aware of the presence of a stranger; to be quite aware of the danger of one's situation; to become conscious of a pain in one's eye. Aware indicates perception without feeling; conscious, generally recognition with some degree of feeling.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Possessing the faculty of knowing one's own thoughts or mental operations.
• adjective Possessing knowledge, whether by internal, conscious experience or by external observation; cognizant; aware; sensible.
• adjective Made the object of consciousness; known to one's self.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective alert, awake.
• adjective aware.
• adjective aware of one's own existence; aware of one's own awareness

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective knowing and perceiving; having awareness of surroundings and sensations and thoughts
• adjective intentionally conceived
• adjective (followed by `of') showing realization or recognition of something