A system of code using symbols of twelve dots arranged as two columns of six dots embossed on a square of paperboard, designed to allow military communication without light or noise. It is the forerunner of braille.

(chiefly US) A night during which new members are required to undergo hazing rituals in order to be accepted into a fraternity, sorority, etc.

plural of woman of the night

(vulgar) Motherfucker (generic term of abuse). / (literally, vulgar) One who engages in incestuous sex with a niece

plural of niece fucker

(Islam) Laylatul Qadr

plural of nigger-head

(dated) A frog.

(simile) Utterly black; pitch-black.

plural of night tremor