air mass

1. 1.

   a large body of air with uniform characteristics horizontally

   Broaderatmosphere

   Narrowerhighlow

Questions about air mass

What does air mass mean?

air mass means "a large body of air with uniform characteristics horizontally".

Is air mass a common word?

air mass is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.