adjective

1. having a feeling or knowledge (of one's own sensations, feelings, etc. or of external things); knowing or feeling (that something is or was happening or existing); aware; cognizant
2. able to feel and think; in the normal waking state
3. aware of oneself as a thinking being; knowing what one is doing and why
4. self-conscious
5. accompanied by an awareness of what one is thinking, feeling, and doing; intentional conscious humor
6. known to or felt by oneself conscious guilt

Etymology: L conscius, knowing, aware < conscire: see conscience