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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Gass said Bay Area residents can expect some post-frontal rain showers on Friday morning as the air mass dries out. 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. 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. 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. Stephen Underwood, Hartford Courant, 18 Jan. 2025 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

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

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