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

Overnight Tuesday, a drier and more stable air mass will descend upon the state, creating a near-zero chance of rain throughout the week and into the weekend. —Bill Kearney, Sun Sentinel, 16 Feb. 2026

Compounding the effects of the freeze were multiple waves of snowfall, freezing rain and sleet that accompanied the arrival of the frigid air mass in Texas. —Newsroom Meteorologist, Houston Chronicle, 13 Feb. 2026

Given the time of year and the warm and relatively humid air mass ahead of the cold front, a few strong storms remain possible. —Newsroom Meteorologist, Austin American Statesman, 11 Feb. 2026

An Arctic air mass from Canada is bringing brutally cold temperatures to Michigan and the Northeast. —Brandi D. Addison, Freep.com, 6 Feb. 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