a space occupied by air.
the amount of breathing air in a room or other enclosed space.
the region of the atmosphere above a municipality, state, or nation, over which it has jurisdiction.
the region of the atmosphere above a plot of ground, to which the owner has rights or access.
Also air·space (for defs 3, 4).
Origin of air space
First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019