air space
Sky above borders
Air space is the atmosphere above a particular territory, especially when considered as subject to jurisdiction: The plane violated Russian air space.
Also written as one word.
More literally, air space is any volume of air or gap filled with air: Leave some air space between the insulation and the wall.
- no-fly zonesAreas barring aircraft entry
- danger zoneHigh-risk location
- sovereigntySupreme independent authority
- atmosphereGaseous layer around planets
- open skiesUnobstructed aerial expanse
sky · airways · aviation · commercial flight · wind · restricted zones · cloud · flightpath · holding pattern · altitude · flying · flight path · buffer zone · ceiling · international treaties · radar systems · restricted · oxygen
- photosynthesisphotosynthesis, chlorophyll, chloroplast, chloroplasts, PSI
vertical domain
air spaceunderground
Below ground or countercultural
ground level · surface area · subsurface · land surface · sea level