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

The most noticeable impact will be a significant wind shift and the arrival of a much cooler, drier air mass. — Michael Autovino, CBS News, 13 Oct. 2026

Some afternoon thunderstorms will blossom in the warm, humid air mass dragged north by Isaias. — Matthew Cappucci, Washington Post, 10 Oct. 2026

Scientists suspect that the combination of high heat and a suffocating deep-tropical air mass will be considered the worst humidity the region has experienced in the modern era. — Los Angeles Times, 9 Sep. 2026

Last week, shifting winds brought up a tropical air mass from Mexico, making swaths of Southern California feel extra muggy in addition to the warm water temperatures contributing to the region’s muggy days, according to Kittell. — Paris Barraza, USA Today, 31 Aug. 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