What it means

1. noun darkness
   “it vanished into the night”
2. noun the dark part of the diurnal cycle considered a time unit
   “three nights later he collapsed”
3. noun the time after sunset and before sunrise while it is dark outside
4. noun the time between sunset and midnight
   “he watched television every night”
5. noun the period spent sleeping
   “I had a restless night”
6. noun a period of ignorance or backwardness or gloom
7. noun a shortening of nightfall
   “they worked from morning to night”
8. noun Roman goddess of night