from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A large body of air with only small horizontal variations of temperature, pressure, and moisture.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a widespread body of air, the properties of which can be identified as:
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a large body of air with uniform characteristics horizontally
Sorry, no etymologies found.