Forties

Forties can mean:
 * 1940s, the years 1940–1949
 * 40s, the years 40-49 AD
 * The years 40-49 of any century - see List of decades
 * The years 40-49 within an individual's lifespan
 * Long Forties, area in the North Sea
 * The Forties shipping forecast area (roughly corresponding to the Long Forties)
 * Forties oilfield in the North Sea
 * Forties pipeline system
 * Roaring Forties, strong westerly winds found in the Southern Hemisphere
 * Forty-ounce or forty, a glass bottle that holds 40 fluid ounces of malt liquor or beer.