air space
noun
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
Words nearby air space
air service,
air shaft,
air shot,
air shower,
air sign,
air space,
air splint,
air spray,
air sprayer,
air spring,
air stack