1. operating between or launched from or involving rockets or aircraft in flight; - Example: "air-to-air missiles" - Example: "air-to-air communications"
WordNet (r) 3.0 (2006):
air-to-air
adj 1: operating between or launched from or involving rockets
or aircraft in flight; "air-to-air missiles"; "air-to-air
communications" [ant: air-to-ground, air-to-surface,
surface-to-air]