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.
After the cold front has passed, the air mass will be chilly and unsettled behind it. — Anthony Edwards, San Francisco Chronicle, 10 Apr. 2026 Once the front clears the area Saturday night, a much cooler air mass will settle in for the second half of the weekend. — Ahmad Bajjey, CBS News, 8 May 2026 The past week saw a large, hot and humid air mass parked over the Mid-Atlantic region, Pallozzi said. — Racquel Bazos, Baltimore Sun, 13 June 2026 The hot and humid air mass will linger for most of the week, bringing high temperatures and potential rain on Tuesday and Thursday. — Mia Thurow, IndyStar, 8 June 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 7 Jul. 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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