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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
Frost will be more limited on Saturday night as a milder air mass continues to build into the area.
—Haadiza Ogwude, The Enquirer, 18 Oct. 2024
For awhile, forecasters didn’t give the unstable air mass much of a chance to develop into a tropical storm, let alone a monster hurricane.
—Shawn Tully, Fortune, 10 Oct. 2024
Our soupy air mass promotes the chance for some hit-or-miss downpours into the evening.
—Ian Livingston, Washington Post, 24 July 2024
This bout of storms is caused by a cool air mass from Canada meeting the heat dome that has brought extreme temperatures across much of the Lower 48 in recent weeks, the weather service said.
—Patrick Smith, NBC News, 16 July 2024
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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 22 Nov. 2024.
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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