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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There will be a brief break in the stormy weather on Thursday as a drier air mass moves in. Kansas City Star, 15 Apr. 2026 After the cold front has passed, the air mass will be chilly and unsettled behind it. Anthony Edwards, San Francisco Chronicle, 10 Apr. 2026 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 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 22 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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