nighttime(n = noun.time) dark, night - the time after sunset and before sunrise while it is dark outside; Array
is a kind of period, period of time, time period
is a part of 24-hour interval, day, mean solar day, solar day, twenty-four hour period, twenty-four hours
has parts: evening, late-night hour, midnight, small hours, lights-out
has particulars: weeknight, wedding night
The time from dusk to dawn; -- opposed to