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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
Gass said Bay Area residents can expect some post-frontal rain showers on Friday morning as the air mass dries out.
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Nollyanne Delacruz, The Mercury News, 14 Feb. 2025
The East Coast was blanketed in snow while people from the Northern Plains to the tip of Maine shivered in bitterly cold temperatures from the frigid Arctic air mass that plunged temperatures well below normal.
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Gerald Herbert and David J. Phillip, Los Angeles Times, 21 Jan. 2025
As the cold front is moving south, the Rocky Mountains in Montana and Wyoming will block off the main part of the air mass, according to meteorologist Kori Anderson, leaving it to hit the east side of the Rockies and the upper Midwest.
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Vincent Medina, Idaho Statesman, 18 Jan. 2025
This week’s Arctic blast is known as the Siberian Express, as the air mass originates from Canada.
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Stephen Underwood, Hartford Courant, 18 Jan. 2025
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Word History
First Known Use
1882, in the meaning defined above
Dictionary Entries Near air mass
Cite this Entry
“Air mass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/air%20mass. Accessed 21 Feb. 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
Britannica.com: Encyclopedia article about air mass
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