a unit for measuring an amount of liquid, especially petrol or water. In the UK, a gallon is equal to 4.55 litres. In the US, a gallon is equal to 3.79 litres. A gallon contains 8 pints or 4 quarts
gallon of:
a gallon of petrol
Synonyms and related words
Units for measuring amounts of liquid
cc
centiliter
centilitre
gallon
noun countable
US /ˈɡælən/
Other entries for this word
ten-gallon hatnoun
miles to the/per/a gallonphrase
Word Forms
singular
gallon
plural
gallons
DEFINITIONS1
1
a unit for measuring an amount of liquid, especially gas or water. In the U.S., a gallon is equal to 3.79 liters. In the U.K., a gallon is equal to 4.55 liters. A gallon contains 8 pints or 4 quarts