Princeton's WordNet

1. 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"

2. wakefulness, sleeplessness(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"

3. watchfulness, wakefulness, vigilance, alertness(noun)

   the process of paying close and continuous attention

   "wakefulness, watchfulness, and bellicosity make a good hunter"; "vigilance is especially susceptible to fatigue"

Wiktionary

1. wakefulness(Noun)

   The state of being wakeful.

U.S. National Library of Medicine

1. Wakefulness

   A state in which there is an enhanced potential for sensitivity and an efficient responsiveness to external stimuli.

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• إسْتيقاظ، أرَق، عَدَم النَّوْمArabic
• безсъниеBulgarian
• vigilânciaPortuguese (BR)
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