(literally) An owl (order Strigiformes) that is nocturnal. / (idiomatic) One who goes to bed late, or stays up late at night or in the early hours of the morning.

(UK) Synonym of Guy Fawkes Night

an unsigned leaflet distributed clandestinely

(historical) Prior to police forces, a person appointed by a town or city to walk the streets at night and guard the burghers from felons and robbers.

An event held on the evening of 25th January in celebration of the Scottish poet and lyricist Robert Burns (born on that day in 1759), usually involving Scottish foods and recitals of his poetry.

(chiefly in the plural) A wedding night on which consummation of the marriage is postponed.

plural of night watch

(euphemistic) A female prostitute. / Brunfelsia spp.

(film) A cinematographic technique in which a crew films in a high-contrast situation, typically in the early morning or late afternoon, with a blue filter, causing the scene to look as if it were shot in moonlight.

(cinematography) In the daytime, with a blue filter, causing the scene to look as if it were shot in moonlight.