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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An Arctic air mass kept its grip on much of the central and eastern U.S. on Friday, plunging temperatures to record lows as snow blanketed central Colorado and the Pacific Northwest braced for an atmospheric river. Christopher Cann, USA TODAY, 21 Feb. 2025 An Arctic air mass descending into the U.S. has brought such frigid temperatures to some states that one major city broke a 150-year-old daily low temperature record by 5 degrees on Monday. Matt Robison, Newsweek, 18 Feb. 2025 In addition, the strip of winter storm and blizzard warnings stretching from South Texas to Jacksonville, Fla. is something rarely seen, as a low pressure area traverses the central Gulf of Mexico, directing abundant moisture northward, into the frigid air mass. Andrew Freedman, Axios, 22 Jan. 2025 Listen to this article An arctic air mass settled over New York City and much of the country Sunday evening, bringing a deep freeze and the chance of more snow than the city has seen in three years. Joseph Wilkinson, New York Daily News, 19 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

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Cite this Entry

“Air mass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/air%20mass. Accessed 5 Mar. 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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