Meanings

interstellar space

air traffic control

aeroplankton

aerodynamics

vacant land

air brake

aerial cableway

empty nest syndrome

atmosphere (esp. of a place or person)

strikeout

fear of having blank days (e.g. for a freelancer)

submarine aircraft carrier

dealt hand containing only 1-point cards (scoring combination)

empty car

aerial warfare

air flotilla

Doolittle raid

tenpai with all potential winning tiles visible on table (impossible to win)

space group

pedestrian zone