The area of the earth between 40 and 50 degrees south, prone to gale-force westerly winds.

plural of back forty

plural of north forty

plural of pianny forty

plural of pianny-forty

Cardinal number after forty-four and before forty-six.

(firearms) A .45-caliber firearm.

Forty plus two; the cardinal number following forty-one and preceding forty-three.

(idiomatic) A short sleep, an extra sleep, a nap.

(inorganic chemistry, archaic) Nitric acid. / (alchemy) A corrosive liquor made of saltpeter, serving as a solvent for dissolving silver and all other metals except gold.