GNU Collaborative International Dictionary of English

Found one definition

1.       
   airborne adj.
   1. conveyed by or through air, as dust or pollen; as, “a clean room is needed to avoid airborne contaminants”.
   
   [WordNet 1.5]
   
   
   2. in flight; flying; -- said of an airplane.
   
   [PJC]
   
   
   3. (Mil.) carried directly to the site of battle by aircraft; -- said of combat troops, as, “an airborne division”.
   
   [PJC]