: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The expiring guidelines have required Arizona reduce its share by more than 500,000 acre-feet, and other agreements have led to still more austerity. Brandon Loomis, AZCentral.com, 13 Feb. 2026 According to the California Department of Water Resources, California’s reservoirs were holding about 28 million acre-feet of water as of Wednesday, Feb. 11. Angela Rodriguez, Sacbee.com, 11 Feb. 2026 Only about 600 homes were ultimately built, but Western Hills remains under contract to purchase up to 8,000 acre-feet of water annually. Nina Burns, CBS News, 10 Feb. 2026 The century-old agreement requires the water released from Upper Basin dams for Arizona, Nevada and California to average at least 7.5 million acre-feet over any decade, plus an allotment for Mexico. Ian James, Los Angeles Times, 5 Feb. 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

Browse Nearby Words

Cite this Entry

“Acre-foot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acre-foot. Accessed 22 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster