n (Noun) — The 14th letter of the Roman alphabet.
n (Noun) — The cardinal compass point that is at 0 or 360 degrees.
n (Noun) — A unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram; equal to 100,000 dynes.
n (Noun) — A common nonmetallic element that is normally a colourless odourless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues.
n (Noun) — (of a solution) concentration expressed in gram equivalents of solute per litre.