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.
Last week, shifting winds brought up a tropical air mass from Mexico, making swaths of Southern California feel extra muggy in addition to the warm water temperatures contributing to the region’s muggy days, according to Kittell. — Paris Barraza, USA Today, 31 Aug. 2026 The front clears tonight and opens the door to a much more comfortable air mass just in time for the weekend. — Bill Kelly, CBS News, 28 Aug. 2026 The amount of water vapor in this air mass will reach levels well above average for even midsummer’s humid reputation. — Briana Waxman, CNN Money, 27 July 2026 The hot air mass will also contribute to the potential for significant vertical plume growth. — Ca Weather Bot, Sacbee.com, 14 July 2026 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

Rhymes for air mass

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Browse Nearby Words

air marshal
air mass
air mass weather
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Cite this Entry

“Air mass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/air%20mass. Accessed 1 Sep. 2026.

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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

Britannica.com: Encyclopedia article about air mass

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