IPA: /ˈɡælən/
KK: /ˈgælən/
A unit of measurement for volume, commonly used for liquids, that is equal to four quarts or about 3.785 liters in the U.S. system.
I bought a gallon of milk from the store.
Gallon → The word 'gallon' originates from Old French 'galon', which means a measure of liquid. It refers specifically to a unit of volume used for liquids.
Think of the Old French word 'galon' for a measure of liquid — this helps you remember that a gallon is a unit for measuring liquid volume.