Entry 1 sense Webster, 1913 Aerodyne /ĕr'-əd-īnˌ/ · Aer·o·dyne · IPA /ˈɛrədˌaɪn/ 01 n. a heavier-than-air aircraft; same as aeroplane. Contrasted with aerostat. 1. a heavier-than-air aircraft; same as aeroplane. Contrasted with aerostat.(Aëronautics) See: aeroplane, aerostat