Antonyms of noun wakefulness

1 of 3 senses of wakefulness

Sense 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")
       Antonym of sleepiness (Sense 1)
      => sleepiness, drowsiness, somnolence -- (a very sleepy state; "sleepiness causes many driving accidents")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun wakefulness

3 senses of wakefulness

Sense 1
wakefulness -- (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")
       => waking -- (the state of remaining awake; "days of danger and nights of waking")
       => physical condition, physiological state, physiological condition -- (the condition or state of the body or bodily functions)

Sense 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")
       => temporary state -- (a state that continues for a limited time)

Sense 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")
       => attention -- (the faculty or power of mental concentration; "keeping track of all the details requires your complete attention")