: the volume (as of irrigation water) that would cover one acre to a depth of one foot

Examples of acre-foot in a Sentence

Recent Examples on the Web
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Its leaders agreed to build the dam six feet higher so that the reservoir had enough space to store 5,000 acre-feet of water to be used for environmental health purposes on South Boulder Creek, which flows out of the bottom of the dam. Elise Schmelzer, Denver Post, 16 Apr. 2025 Increasing reuse to 50 percent could push annual savings to 1.3 million acre-feet. Thomas G. Moukawsher, MSNBC Newsweek, 13 Apr. 2025 In return, the U.S. sends 1.5 million acre-feet of water every year to Mexico from the Colorado River. Filip Timotija, The Hill, 12 Apr. 2025 In a social media post, Mr. Trump accused Mexico of failing to provide 1.3 million acre-feet of water — or more than 420 billion gallons — under a 1944 treaty mediating the distribution of water from three rivers, the Rio Grande, the Colorado and the Tijuana. Chris Cameron, New York Times, 11 Apr. 2025 See All Example Sentences for acre-foot

Word History

First Known Use

1889, in the meaning defined above

Time Traveler
The first known use of acre-foot was in 1889

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Cite this Entry

“Acre-foot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acre-foot. Accessed 3 May. 2025.

Kids Definition

acre-foot

noun
: the volume (as of irrigation water) that would cover one acre to a depth of one foot

More from Merriam-Webster on acre-foot

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