: 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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Stakeholders across the region adhere to a century-old Colorado River Compact that allocated 7.5 million acre-feet annually to each of the two basins. Sharon Udasin, The Hill, 20 June 2025 An acre-foot of water is the amount of water needed to cover an acre in a foot of water — 325,851 gallons — and is generally enough to provide for two Colorado families’ yearly needs. Elise Schmelzer, Denver Post, 18 June 2025 Lake Mead is the largest reservoir in the U.S., capable of storing nearly 29 million acre-feet of water. Joe Edwards, MSNBC Newsweek, 13 June 2025 An acre-foot is enough water for two families’ annual water use. Elise Schmelzer, Denver Post, 5 June 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 27 Jun. 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

Last Updated: - Updated example sentences
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