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

Experts say a lingering cold air mass across the Midwest could keep temperatures below historical averages well into early spring. —Brandi D. Addison, IndyStar, 3 Feb. 2026

Don’t worry, though, a warming trend is expected through the afternoon as the arctic air mass shifts northeast, taking the freezing temperatures with it. —Newsroom Meteorologist, Austin American Statesman, 1 Feb. 2026

Bombogenesis can happen when a cold air mass collides with a warm air mass, such as air over warm ocean waters. —Rick Sobey, Boston Herald, 30 Jan. 2026

That arctic air mass that has enveloped much of southern Wisconsin has been a blessing for skiers Up North. —La Risa R. Lynch, jsonline.com, 29 Jan. 2026

Word History

First Known Use

1882, in the meaning defined above

Rhymes for air mass

• alas
• amass
• bromegrass
• bypass
• chagas
• crabgrass
• crevasse
• eelgrass
• eyeglass
• groundmass
• harass
• impasse

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