: 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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The federal Bureau of Reclamation, which serves farmers in the Central Valley, would get 39,000 acre-feet of the new water. Paul Rogers, Mercury News, 23 Jan. 2026 When the project is completed in 2029, MWD will be able to deliver as much as 22,000 acre-feet of water to SWP-dependent areas during times of severe drought. City News Service, Daily News, 22 Jan. 2026 Until those are in place, though, Dyer said the 27 district basins near the dam can capture 80,000 acre-feet of stormwater each year. Erika I. Ritchie, Oc Register, 16 Jan. 2026 While cuts to the Lower Basin could amount to 4 million acre-feet of water, those required of the Upper Basin would instead be limited to 350,000 acre-feet. Elise Schmelzer, Denver Post, 15 Jan. 2026 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 2 Feb. 2026.

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

Last Updated: - Updated example sentences
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