nighttime

night·time  (nttm)

n.

The time between sunset and sunrise.

adj.

Occurring in or appropriate for use during the night: nighttime activities; nighttime attire.

Thesaurus

Noun

1.

nighttime - the time after sunset and before sunrise while it is dark outside night, dark period, period of time, time period - an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period" 24-hour interval, day, mean solar day, solar day, twenty-four hour period, twenty-four hours - time for Earth to make a complete rotation on its axis; "two days later they left"; "they put on two performances every day"; "there are 30,000 passengers per day" weeknight - any night of the week except Saturday or Sunday evening - the early part of night (from dinner until bedtime) spent in a special way; "an evening at the opera" late-night hour - the latter part of night midnight - 12 o'clock at night; the middle of the night; "young children should not be allowed to stay up until midnight" small hours - the hours just after midnight lights-out - a prescribed bedtime wedding night - the night after the wedding when bride and groom sleep together