A form of air mass — a widespread body of air, the properties of which can be identified as: (a) having been established while that air was situated over a particular region of the Earth's surface (airmass source region) and (b) undergoing specific modifications while in transit away from the source region. An air mass is often defined as a widespread body of air that is approximately homogeneous in its horizontal extent, particularly with reference to temperature and moisture distribution; in addition, the vertical temperature and moisture variations are approximately the same over its horizontal extent.
air masses. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/air%20masses
“air masses.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/air%20masses. Accessed November 5, 2026.
WatkinsX Dictionary, s.v. “air masses,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/air%20masses.
Source: air masses on Wiktionary, CC BY-SA 4.0.