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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However, an air mass can sometimes block a storm, driving it north or northeast toward the Baja California peninsula and the west coast of Mexico. William B. Davis, New York Times, 17 June 2025 Meanwhile, people from the Northern Plains to the tip of Maine were experiencing bitterly cold temperatures Monday as an Arctic air mass caused temperatures to plunge well below normal with dangerously cold wind chills, while the East Coast contends with a thick blanket of snow. Michael Casey, Los Angeles Times, 20 Jan. 2025 Saharan dust is an extremely dry, dusty air mass, containing about 50% less moisture than the typical tropical atmosphere, the National Hurricane Center notes. Howard Cohen, Miami Herald, 30 May 2025 Spring is a transition time when the cold and dry air mass from the Arctic, which dominates the region in winter, is gradually being pushed away by warm and moist air from the Gulf that dominates the region in summer. Shuang-Ye Wu, The Conversation, 8 Apr. 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

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Cite this Entry

“Air mass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/air%20mass. Accessed 29 Jun. 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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