A regular night on which a couple goes out on a date. For example, a couple may go on a date every Friday night.

(pathology) A sleeping disorder, where sleep is interrupted by anxiety, panic or screaming.

(colloquial, usually childish) Alternative spelling of nighty night

Walpurgisnacht ("Walpurga's night"), a feast of witchcraft in German folklore, observed on 30 April. / (by extension) Any orgiastic or bacchanalian party.

(colloquial, usually childish) Good night.

plural of night school

A regularly scheduled period of work, during evening or night hours. / A group of workers who work during the night.

A party held for a woman who is about to be married, normally attended only by female friends and relatives.

Alternative spelling of nighthawk

(idiomatic) A person whose preference or custom is to remain awake and active during the evening and early morning (night) hours, and who usually sleeps during part of the daytime.