What is Night?

Night definition and meaning on Dictionary terms:
the period of darkness between sunset and sunrise.
the beginning of this period; nightfall.
the darkness of night; the dark.

a condition or time of obscurity, ignorance, sinfulness, misfortune, etc.: the long night of European history known as the Dark Ages.
(sometimes initial capital letter) an evening used or set aside for a particular event, celebration, or other special purpose: a night on the town; poker night; New Year’s Night.

of or relating to night: the night hours.
occurring, appearing, or seen at night: a night raid; a night bloomer.
used or designed to be used at night: to take a night coach; the night entrance.

working at night: night nurse; the night shift.
active at night: the night feeders of the jungle.