To define awareness, we can only use another word, "Consciousness", for example:
Awareness means you are aware of something; it is opposed to inertness or nonawareness. What is opposed to inertness is that which is not inert awareness.
Awareness, therefore, can be defined as what is manifest in all forms of perception, in all forms of knowing. Awareness is qualified by different objects. When I say I am aware of the pot, for example, there is pot awareness. Similarly when I say I am aware of the cloth, there is cloth awareness.
Whenever you are aware of something, that something becomes the qualifying for awareness. This awareness can be defined in terms of knowledge as such. What is basic in all forms of knowledge is pure existence (satyam). Therefore, knowledge is defined as existence, and existence is defined as knowledge. One helps to define other. The basis for all forms of knowledge is what we mean by awareness.
Awareness is Be alert and have another look! That's it. This is all we need to focus on. We are alert that there are illusions that cloud our awareness and we take another look to investigate them. We'll focus on developing awareness of our bodies, awareness of our thinking, and awareness of our awareness. Each of these expands and deepens our understanding of ourselves and the interconnectedness of the universe. We'll need a tool for being alert and looking deeper. That tool is attention.
Credit: Arno Ilgner
alive, apprehensive, conscious, cognizant, mindful, sensible, sentient, ware, witting
insensible, oblivious, unaware, unconscious, unmindful, unwitting
alert, attentive, careful, cautious, heedful, observant, open-eyed, regardful, safe, vigilant, wary, watchful, wide-awake; hyperaware, hyperconscious
careless, heedless, inattentive, incautious, mindless, unguarded, unheeding, unwary
Nigel G Goodman and Ideal Community Empowerment.