Definition of "Wakefulness" :

noun: a periodic state during which you are conscious and aware of the world

"Consciousness during wakefulness in a sane person is pretty well ordered and familiar."

noun: the process of paying close and continuous attention

"Wakefulness, watchfulness, and bellicosity make a good hunter."

noun: a temporary state in which you are unable (or unwilling) to sleep

"Accept your wakefulness and sleep in its own contrary way is more likely to come."