gallon

noun

gal·​lon ˈga-lən How to pronounce gallon (audio)
: a unit of liquid capacity equal to 231 cubic inches or four quarts see Weights and Measures Table

Examples of gallon in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Hundreds of gallons of water pour from an opening in the rock every second. Greg Allen, NPR, 17 Jan. 2025 There, water is pumped uphill into three tanks, each with a capacity of 1 million gallons of water. Matt Hamilton, Los Angeles Times, 16 Jan. 2025 Center pivot sprinklers can disperse hundreds of gallons per minute from a well, 24 hours a day, for weeks or months on end. David Newcomb, Kansas City Star, 16 Jan. 2025 Among the aircraft supplied by the association are helicopters, like Blackhawks and ACH 47 Chinooks, and air tankers, like Grumman S-2T and Lockheed C-130H planes, carrying thousands of gallons of water. Christina Coulter, Fox News, 16 Jan. 2025 See all Example Sentences for gallon 

Word History

Etymology

Middle English galun, galoun, galon, a liquid measure, borrowed from Anglo-French galun, galon, jalon, from Old French jal-, base of jaloie "container for liquids, bucket" (going back to Vulgar Latin *gallēta, of uncertain origin) + -on, diminutive or particularizing suffix, going back to Latin -ō, -ōn-, suffix of persons with a prominent feature

Note: Presumed *gallēta (attested as Medieval Latin galeta "wine vessel, liquid measure" in 11th-century texts) has been linked to several classical Greek words for containers, as kálathos "kind of basket, wine cooler," kēlástra "milk pail" (so glossed by Hesychius), though none of these fit formally; on the other hand, kēlḗtēs, kalḗtēs "sufferer from a hernia" (from kḗlē, kálē "tumor, hernia"; see -cele) fits formally but requires a contextual and semantic leap ("one swollen or ruptured" > "container"?).

First Known Use

13th century, in the meaning defined above

Time Traveler
The first known use of gallon was in the 13th century

Dictionary Entries Near gallon

Cite this Entry

“Gallon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gallon. Accessed 23 Jan. 2025.

Kids Definition

gallon

noun
gal·​lon ˈgal-ən How to pronounce gallon (audio)
: a unit of liquid capacity equal to 231 cubic inches or four quarts see measure

Medical Definition

gallon

noun
gal·​lon ˈgal-ən How to pronounce gallon (audio)
1
: a United States unit of liquid capacity equal to four quarts or 231 cubic inches or 3.785 liters
2
: a British unit of liquid and dry capacity equal to four quarts or 277.42 cubic inches or 4.544 liters

called also imperial gallon

More from Merriam-Webster on gallon

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