radionavigation UK /ˈɹeɪdiˌəʊnævɪɡeɪʃən/US /ˈɹeɪdiˌoʊnævɪɡeɪʃən/ noun1 •Radio navigation; navigation using radio signals to provide positional information.In Region 2, the use of the band 435-495 kHz by the aeronautical radionavigation service is limited to non-directional beacons not employing voice transmission. — 2020