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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The bitterly cold air mass is affecting the western, central and eastern United States this week, causing temperatures to plunge far below normal for January. Nazaneen Ghaffar, New York Times, 20 Jan. 2025 Originating in Siberia, a bitter cold air mass will likely produce dangerous wind chills across portions of the Southeast and send temperatures below freezing as far south as the Gulf Coast and Florida. Alexis Simendinger, The Hill, 3 Jan. 2025 The warm forecast for Sunday afternoon though Monday will be hit again with a much drier and colder air mass moving behind a front Monday night. Richard Tribou, Orlando Sentinel, 2 Jan. 2025 The longer the fetch, the more time the cold, dry air mass has to suck up warm water along the way. Caitlin Looby, Journal Sentinel, 2 Dec. 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 30 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!