: 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 bypass flows from Wellton-Mohawk to the ciénega have averaged 134,000 acre-feet over the past five years, according to CAP. Brandon Loomis, AZCentral.com, 15 Dec. 2025 Under the Utilization of Waters of the Colorado and Tijuana Rivers and of the Rio Grande Treaty of 1944, Mexico is required to provide at least 350,000 acre-feet of water every five years, but the country has underdelivered on that promise due to its own drought conditions and water shortages. Kate Nishimura, Sourcing Journal, 9 Dec. 2025 Trump’s 200,000 acre-feet now-or-tariffs demand represents around 65 billion gallons. Newsweek Editors, MSNBC Newsweek, 9 Dec. 2025 According to the California Department of Water Resources, California’s reservoirs were holding about 23 million acre-feet of water as of Tuesday, Nov. 25. Sacbee.com, 26 Nov. 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 22 Dec. 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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