Read the dictionary definition of night. All definitions for this word.
1. Roman goddess of night; daughter of Erebus; counterpart of Greek Nyx
2. darkness
1. it vanished into the night
3. the dark part of the diurnal cycle considered a time unit
1. three nights later he collapsed
4. the time after sunset and before sunrise while it is dark outside
5. the time between sunset and midnight
1. he watched television every night
6. the period spent sleeping
1. I had a restless night
7. a period of ignorance or backwardness or gloom
8. a shortening of nightfall
1. they worked from morning to night