In Buddhism, the fifth of the Five Aggregates which compose a human being. Awareness is usually thought of as self-awareness, awareness of a particular individual distinct from others. Might be thought of as a sense of self.

Awareness is one of the first steps to becoming intelligent. One can know many things and still not be aware of anything. You are probably aware if you find yourself questioning something, and then coming to a conclusion which you've known all along from others but never quite understood.