WordReference Random House Learner's Dictionary of American English © 2025
ˈair ˌmass, n. [countable]
  1. Meteorologya body of air covering a wide area and having almost the same properties or characteristics throughout.

WordReference Random House Unabridged Dictionary of American English © 2025
air′ mass′, 
  1. Meteorologya body of air covering a relatively wide area, exhibiting approximately uniform properties through any horizontal section.
  • 1890–95

Collins Concise English Dictionary © HarperCollins Publishers::
air mass
  1. a large body of air having characteristics of temperature, moisture, and pressure that are approximately uniform horizontally
'air mass' also found in these entries (note: many are not synonyms or translations):
cold front - heat wave - heatwave - warm front

Forum discussions with the word(s) "air mass" in the title:


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