air-to-air

air–to–air

adjective \ˌer-tə-ˈ(w)er\

: shot from one flying airplane at another

Full Definition of AIR-TO-AIR

:  launched from one airplane in flight at another <air–to–air missiles>; also :  involving aircraft in flight <air–to–air combat>

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First Known Use of AIR-TO-AIR

1939