aviation/ˌeɪviˈeɪʃən/1航空the aggregation of a country's military aircraft同义词: air power2航空travel via aircraft同义词: air travelair3航空the art of operating aircraft同义词: airmanship4航空the process of flying an aircraft5航空, 航空学the study of the design, development, and operation of aircrafts, focusing on principles of aerodynamics, propulsion, and material science