Definition of gallon
: a unit of liquid capacity equal to 231 cubic inches or four quarts — see weight table
Recent Examples of gallon from the Web
The rules, enacted by Trump predecessor Barack Obama, would boost the fuel economy of new cars and light trucks to an average of about 50.8 miles per gallon by 2025, up from 30.3 mpg this year.
The Ioniq is rated to go 55 miles on a gallon of gasoline — three more than the Prius.
Every day, from Monday through Thursday, one pallet of barley is turned into 1,000 gallons of beer, amounting to around 8,000 pours in the tasting room.
Coolant spurted out of the valve, covering the floor with 80,000 gallons of highly radioactive water.
In recent years, prices have risen 35 to 70 cents per gallon heading into Memorial Day, says Patrick DeHaan, an analyst for the price-comparison site GasBuddy.
Under the blue ribbon advisory council's framework, the road could be funded with tolls of 20 cents per mile — about three times the Tollway average — a 4 cent per gallon fuel tax and a capture of real estate tax revenues.
The rate adjustment equates to a monthly jump of about $2.11 for the average single-family house using roughly about 12,000 gallons of water per month.
The pipeline leaked 84 gallons of oil in South Dakota on April 4.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'gallon'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of gallon
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 ◆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 centurySee Words from the same year
GALLON Defined for English Language Learners
Definition of gallon for English Language Learners
: a unit of liquid measurement equal to four U.S. quarts or 3.785 liters
: a unit of liquid measurement equal to four British quarts or 4.546 liters
GALLON Defined for Kids
Definition of gallon for Students
: a unit of liquid capacity equal to four quarts (about 3.8 liters)
Medical Definition of gallon
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
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