- (in Britain and North America) a unit for measuring liquid. In the UK, Canada and other countries it is equal to about 4.5 litres; in the US it is equal to about 3.8 litres. There are four quarts in a gallon.
- The tankers carried 130 000 gallons of fuel.
Word OriginMiddle English: from Anglo-Norman French galon, from the base of medieval Latin galleta, galletum ‘pail, liquid measure’, perhaps of Celtic origin.Definitions on the go
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gallon