- space for maneuvering an aircraft flying in formation
- the space extending upward above an area of the earth's surface; specif., the space above a nation over which it can claim jurisdiction
- the space above private land needed for its quiet enjoyment
or air space
- The portion of the atmosphere directly above the land or water, used by aircraft or by earth-based structures such as skyscrapers.
- The airspace of a particular jurisdiction, such as a nation.
- (politics, aviation) A specified portion of the atmosphere, especially that under the technical aviation control and/or jurisdiction of a particular state over which territory (territorial waters) it lies.
- Various European countries transferred the aviation control of their adjoining airspace to Eurocontrol, while each retaining legal jurisdiction
- (aviation) A designated part of the sky for aircraft use.
- (broadcasting) Space (i.e. a few neighboring frequencies) available for broadcasting within a particular frequency band.
- The legalisation of free radios caused a bitter fight for airspace.
- The portion of an enclosed area which contains air, especially breathable air.
- (construction) The cavity in a cavity wall containing air for insulation.