wakefulness

Noun

• the process of paying close and continuous attention
  • wakefulness, watchfulness, and bellicosity make a good hunter
    
  • vigilance is especially susceptible to fatigue
    

• 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
    

• 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
    

Related words

• Synonyms: 
  watchfulness , vigilance , alertness , sleeplessness
• Antonyms: 
  sleepiness , drowsiness , somnolence