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
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Rain remains absent from Houston’s forecast Despite the increasingly humid air mass settling into Southeast Texas, rain chances stay stubbornly low. Newsroom Meteorologist, Houston Chronicle, 24 Mar. 2026 Heat domes are associated with a stagnant air mass and record-challenging heat, Kines said. Doyle Rice, USA Today, 21 Mar. 2026 The cooler air mass should keep temperatures in the 60s or lower on Tuesday, while a persistent north wind and cloudy skies should create cooler conditions through the end of the week. Bill Kearney, Sun Sentinel, 16 Mar. 2026 The air mass will overall warm, however, as low-level winds shift to the southwest. Trey Fulbright, CBS News, 15 Mar. 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

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Cite this Entry

“Air mass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/air%20mass. Accessed 2 Apr. 2026.

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

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