What is consciousness?
It is a question many philosophers and scientists have tried defining throughtout the ages.
According to Wikipedia, consciousness is defined as awareness of internal and external existence and I would have to say that is at least the start of it.
Before we become awakened, we are unaware of our slumber but as the rosy layers are peeled off the glasses, we start to see the world through a new lens and realize that we have been asleep. This is a level of consciousness. This is physical consciousness.
When we start to ponder the more esoteric views of consciousness, it is clear that this is something that isn’t tangible or really definable.