noun (n)

• a period of sleeplessness(noun.cognition)

  source: wordnet30
• the rite of staying awake for devotional purposes (especially on the eve of a religious festival)(noun.act)

  Synonym:
  watch
  

  source: wordnet30
• a purposeful surveillance to guard or observe(noun.act)

  source: wordnet30
• Abstinence from sleep, whether at a time when sleep is customary or not; the act of keeping awake, or the state of being awake, or the state of being awake; sleeplessness; wakefulness; watch.(noun)

  source: webster1913