air mass

noun

: a body of air extending hundreds or thousands of miles horizontally and sometimes as high as the stratosphere and maintaining as it travels nearly uniform conditions of temperature and humidity at any given level

Examples of air mass 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 Arctic air mass was expected to continue pushing south and east over the weekend, expanding into Southern states by Sunday. CBS News, 13 Dec. 2025 Lake-effect snowstorms occur when cold, dry air travels over open water, sucking up moisture that is released when the air mass hits land. Caitlin Looby, jsonline.com, 12 Dec. 2025 An Arctic air mass is expected to reach the Charlotte area on Sunday, resulting in temperatures low enough to cause pipes to freeze and burst. Mark Price, Charlotte Observer, 12 Dec. 2025 The air mass will also fuel lake-effect snow across the Upper Peninsula. Brandi D. Addison, Freep.com, 12 Dec. 2025 See All Example Sentences for air mass

Word History

First Known Use

1882, in the meaning defined above

Time Traveler
The first known use of air mass was in 1882

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Cite this Entry

“Air mass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/air%20mass. Accessed 20 Dec. 2025.

Kids Definition

air mass

noun
: a body of air extending hundreds or thousands of miles sideways and sometimes as high as the stratosphere and having nearly the same conditions of temperature and humidity at any single level

More from Merriam-Webster on air mass

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