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

Following the front, a cooler and more comfortable air mass arrives by next Sunday. — Andrew Kozak, CBS News, 13 July 2026

The hot air mass will also contribute to the potential for significant vertical plume growth. — Ca Weather Bot, Sacbee.com, 13 July 2026

And overall, rain and thunderstorms should expand in coverage across much of the eastern half of the nation this weekend within the very warm, moist and unstable air mass, the weather service said. — Doyle Rice, USA Today, 1 July 2026

The past week saw a large, hot and humid air mass parked over the Mid-Atlantic region, Pallozzi said. — Racquel Bazos, Baltimore Sun, 13 June 2026

Word History

First Known Use

1882, in the meaning defined above

Rhymes for air mass

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

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