"2. not aware of one's actions, behaviour, etc."
Very few animals are self-aware.
adj.
1. Lacking awareness and the capacity for sensory perception; not conscious.
2. Temporarily lacking consciousness.
3. Occurring in the absence of conscious awareness or thought: unconscious resentment; unconscious fears.
4. Without conscious control; involuntary or unintended: an unconscious mannerism.
So, where'd that definition come from?