"wakefulness" in the noun sense
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"
2. wakefulness, sleeplessness
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"
3. watchfulness, wakefulness, vigilance, alertness
the process of paying close and continuous attention
"wakefulness, watchfulness, and bellicosity make a good hunter"
"vigilance is especially susceptible to fatigue"
Source: WordNet® (An amazing lexical database of English)
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