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

An arctic air mass will settle over the Charlotte area on Martin Luther King Jr. Day, bringing lows in the mid teens and a chance of snow, according to the National Weather Service. —Mark Price, Charlotte Observer, 20 Jan. 2025

That night, the storm system is predicted to develop when an Arctic air mass to the north interacts with a surge of warmer, moister air from the Gulf of Mexico. —Amanda Castro, Newsweek, 26 Nov. 2024

Those conditions are expected to fade as a cold front pushes out the dry air mass over the Southeast and brings rain by Tuesday, the National Weather Service said. —Mirna Alsharif, NBC News, 2 Mar. 2025

By Thursday, the very cold, dry air will be replaced by a warmer, moist air mass off the Pacific Ocean, Colin said. —Carolyn Komatsoulis, Idaho Statesman, 11 Feb. 2025

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