What is the meaning of night?

noun

• The time after sunset and before sunrise while it is dark outside.
  • synonyms: nighttime, dark
• A period of ignorance or backwardness or gloom.
• The period spent sleeping.
  • usage: "I had a restless night"
• The dark part of the diurnal cycle considered a time unit.
  • usage: "three nights later he collapsed"
• Darkness.
  • usage: "it vanished into the night"
• A shortening of nightfall.
  • usage: "they worked from morning to night"
• The time between sunset and midnight.
  • usage: "he watched television every night"
• Roman goddess of night; daughter of Erebus; counterpart of Greek Nyx.
  • synonyms: Nox