- the atmosphere above the lower portion of the troposphere.
Compare upper atmosphere.
Origin of upper air
First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for upper air
We are disabled and are being blown out to sea in the grip of an upper-air hurricane!The Motor Boys Over the Ocean
No, but a new and rare kind of upper-air mosquito has just alighted on your shoulder, spoke the professor, eagerly.The Motor Boys Over the Rockies
These made the upper-air half of the garden, the other half being assembled below.The Amateur Garden
George W. Cable
Unfortunately their periods of seclusion are more prolonged than those of their upper-air distance.North America, Volume II (of 2)