gal‧lon /ˈɡælən/ noun [countable]
[Date: 1200-1300; Language: Old North French; Origin: Medieval Latin galeta 'liquid container, liquid measure']

1. (written abbreviation gal) a unit for measuring liquids, equal to eight pints. In Britain this is 4.55 litres, and in the US it is 3.79 litres:
a 20 gallon fish tank
The car does about 50 miles per gallon.

2. informal a lot of a liquid:
We drank gallons of coffee.

[TahlilGaran] Dictionary of Contemporary English ▲

gallon
noun
 ⇒ Note at MEASURE

[TahlilGaran] Collocations Dictionary ▲

gallon
ˈɡælən
See: ten-gallon hat

[TahlilGaran] English Idioms Dictionary ▲