airborne adjective 4noun 1forms 1 adjective4 •In or carried by the air.Airborne pollen can aggravate allergies. •In flight.There goes the siren that warns of the air raid / Then comes the sound of the guns sending flak / Out for the scramble we've got to get airborne / Got to get up for the coming attack. — 1984 •Transported by air in an aircraft.airborne troops •Fitted to an aircraft. noun1 •Military infantry intended to be transported by air and delivered to the battlefield by parachute or helicopter. formsairbornes