noun
gallon
GA-luhn
noun
1
A unit of liquid volume, roughly 3.8 liters in the US and 4.5 liters in the UK.
"He filled the tank with ten gallons of gas."
"The recipe called for a gallon of milk."
How to Use Gallon
Learner’s notesIn plain EnglishA common unit for measuring liquids.
UK vs US
A US gallon (3.785 liters) is smaller than a UK imperial gallon (4.546 liters) — always check which system is being used.
Word Forms
gallons plural, Gallons plural
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He filled the tank with ten _____ of gas.
Etymology
From Old Northern French galun, ultimately traced back to a Vulgar Latin word for a vessel or container.