- : abbrev. gal
- a unit of liquid measure, equal to 4 liquid quarts (3.7854 liquid liters): the British and Canadian imperial gallon equals 4.54596 liquid liters
- a unit of dry measure, equal to peck or 4 dry quarts (4.4048 dry liters or 0.1556 cubic foot)
- any container with a capacity of one gallon
Origin of gallonMiddle English galoun ; from Norman French galon ; from Old French jalon ; from Vulgar Latin an unverified form gallone ; from stem of Late Latin galleta, a jug
- Abbr. gal.a. A unit of volume in the US Customary System, used in liquid measure, equal to 4 quarts (3.785 liters).b. A unit of volume in the British Imperial System, used in liquid and dry measure, equal to 4 quarts (4.546 liters). See Table at measurement.
- A container with a capacity of one gallon.
Origin of gallonMiddle English, a liquid measure, from Old North French galon.
- A unit of volume, equivalent to eight pints
- (UK, Canada) exactly 4.54609 liters; an imperial gallon
- (US) 231 cubic inches or approximately 3.785 liters for liquids (a "U.S. liquid gallon")
- (US) one-eighth of a U.S. bushel or approximately 4.405 liters for dry goods (a "U.S. dry gallon").
- (in the plural, informal) A large quantity (of any liquid).
- The pipe burst and gallons of water flooded into the kitchen.