a common unit of capacity in English-speaking countries, equal to four quarts, the U.S. standard gallon being equal to 231 cubic inches (3.7853 liters), and the British imperial gallon to 277.42 cubic inches (4.546 liters). Abbreviation: gal.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use gallon in a sentence
The millions of gallons that trickle and drain naturally into California belong to California.
Mix about 1½ cups of cleaner per gallon of water, then spray or mop on.Need to remove sap from asphalt? Get out the hand sanitizer. | Jeanne Huber | November 30, 2020 | Washington Post
We’re letting millions of gallons of sewage-contaminated Tijuana River water go to waste by tossing it to the Pacific Ocean.Two Companies See a Golden Opportunity in the Tijuana River’s Brown Waters | MacKenzie Elmer | November 20, 2020 | Voice of San Diego
A family of four pees about 13 gallons a week, and that can add up to millions of gallons every year in a big city.Your pee could be the golden ticket to a greener world | Ula Chrobak | November 19, 2020 | Popular-Science
The K23 has a better battery—41 kilowatt hours versus the K27’s 17 kilowatt hours—but it takes a little longer to charge and gets fewer miles per gallon in both city and highway driving.You Can Buy This Electric Car for $7,999 in California | Vanessa Bates Ramirez | November 12, 2020 | Singularity Hub
Three years later, Washington came armed with ample alcohol—enough for a half gallon for every voter—and won with 331 votes.
The result is that a gallon of milk at the local market costs $12.55.
“These people act like we drink a gallon of blood and hang upside down from crucifixes before we go onstage,” Rob Halford says.
Item 10 “Taxable refunds”… $1.98 at Safeway for a half gallon of milk that was past its sell-by date.Up to a Point: I Do My Own Taxes With No Help, Except From a Couple of Bloody Marys | P. J. O’Rourke | April 15, 2014 | THE DAILY BEAST
Every gallon of ice cream you purchase in the Grand Canyon State is guaranteed to weigh at least four and a half pounds.
Of course, it was the same gallon or two pumped around and around, but clear, flowing water is a sight on Mars.Fee of the Frontier | Horace Brown Fyfe
I hadn't thought of burros—me on one of 'em—slapping with my hat to get two miles to the gallon!David Lannarck, Midget | George S. Harney
The incomers slept eight in a room, burned oil at one dollar a gallon, and ate potatoes at ten cents apiece.The Trail of the Lonesome Pine | John Fox, Jr.
The price of oil was then about thirty-five cents a gallon at retail, or to the consumer.
The following evening he presented himself with a couple of one-gallon cans, one of them without a bottom.Etidorhpa or the End of Earth. | John Uri Lloyd
British Dictionary definitions for gallon
Also called: imperial gallon British a unit of capacity equal to 277.42 cubic inches. 1 Brit gallon is equivalent to 1.20 US gallons or 4.55 litres
US a unit of capacity equal to 231 cubic inches. 1 US gallon is equivalent to 0.83 imperial gallon or 3.79 litres
(plural) great quantities
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for gallon
A unit of liquid volume or capacity in the US Customary System equal to 4 quarts (3.79 liters). See Table at measurement.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.