Definition of gallon in English:

Share this entry


Pronunciation: /ˈɡalən/


1A unit of volume for liquid measure equal to eight pints, in particular:
1.1 (also imperial gallon) British (Also used for dry measure) a unit of volume equivalent to 4.55 litres.
Example sentences
  • A British gallon is 5 litres, but a US one is less.
  • Pump prices have already soared to 81p per litre - £3.68p a gallon - on many forecourts.
  • It was announced that garages would switch to selling petrol by the litre instead of the gallon from the following autumn.
1.2US A unit of volume equivalent to 3.79 litres.
Example sentences
  • This is also known as water volume which is measured in gallons per minute or litres per minute and the amount of water being thrown at the surface being cleaned.
  • This statement is often said by Canadians looking at all the US tourists trying to figure out how to convert litres to gallons.
  • The economics of doing that are such that one ends up using the equivalent of six gallons of gasoline to make enough hydrogen to replace one gallon of gasoline.
2 (gallons of) informal A large volume of something: gallons of fake blood
More example sentences
  • Rather than wasting multiple gallons of energized water I should think it would be profitable, if not philanthropic, to bottle it and take it to market.
  • What do a few buckets of waste mean anyway, in the grand scheme of things as you bob up and down atop gazillions of gallons of seawater?
  • Just as well we're in the country here, with a good breeze and gazillions of gallons of fresh air to sweep it up.



Example sentences
  • When the latest gallonage is added to the existing milk pool, the expansion makes Lakeland the fourth largest dairy milk processor in the country with operations spanning 15 counties.
  • Actually, gallonage was down by almost 1 percent.
  • Generally, the average high-volume gallonages in California on deciduous trees is about 400 gallons.


Middle English: from Anglo-Norman French galon, from the base of medieval Latin galleta, galletum 'pail, liquid measure', perhaps of Celtic origin.

  • This unit of volume for liquids is from Anglo-Norman French galon, from medieval Latin galletum ‘pail, liquid measure’. The origin may be Celtic.

Words that rhyme with gallon

Alan, talon

For editors and proofreaders

Line breaks: gal¦lon

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.