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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But weather forecasters warned that colder air was still headed South, with an Arctic air mass spilling south out of Canada. Daniel Arkin, NBC News, 1 Dec. 2024 Lake-effect snowstorms occur when cold, dry air travels over open water, sucking up moisture that is released when the air mass hits land. Caitlin Looby, Journal Sentinel, 23 Dec. 2024 The arctic blast's effects are expected to taper off early in the week, but forecasters warned that colder air was still headed south, with an Arctic air mass spilling south out of Canada. Mirna Alsharif, NBC News, 2 Dec. 2024 Even if the cold Canadian air mass is delayed in its southward progression, the combination of drenching rain and strong winds could create hazardous conditions. Tom Rogers, Newsweek, 25 Nov. 2024 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 6 Jan. 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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