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

Meteorologists project that the rain will continue into the weekend for residents between San Francisco, Oakland and San Jose, with the chance for thunderstorms increasing to 25-35% as the polar air mass continues to destabilize the atmosphere throughout the day. —Katie Lauer, The Mercury News, 4 Apr. 2024

Crappie Fishing in the Winter During the hard-water season, everyone loves to wake up to an unseasonably warm air mass, near normal barometer, light wind, and bearable precipitation. —Don Wirth, Field & Stream, 4 Apr. 2024

Word History

First Known Use

1882, in the meaning defined above

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