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

A bird that is active in the night; a nocturnal bird. / A human denizen of night.

A session in a club, theatre etc. in which amateurs perform, rather than professionals.

A creature which flies at night; a nocturnal flier or traveler. / (often attributive) One who departs or flees at night in order to avoid creditors, law enforcement etc.

(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.

plural of fly-by-night

plural of amateur night

plural of lady of the night

plural of night blindness

plural of night-soil