IPA: //ˈɛərbɔrn//
KK: /ˈɛrˌbɔrn/
Something that is carried or moved through the air, often referring to objects or substances that are flying or floating in the atmosphere.
The helicopter became airborne within seconds of takeoff.
Airborne → It is formed from "air" (from Old English "aer", meaning the atmosphere or sky) and "borne" (from Old English "beran", meaning to carry). The word "airborne" describes something that is carried or transported through the air.
Imagine something that is 'carried' ('borne') in the 'atmosphere' ('air') — that's what airborne means.