the transmission and reception of signals by means of electromagnetic waves
a system that transmits and receives signals in this way, esp for the purposes of sound broadcasting or two-way communication
a device designed to receive sound broadcasts; a radio receiver
a device designed to allow two-way communication by radio, e.g. in an aircraft
a radio broadcasting organization or station
Radio London
the radio broadcasting industry
the medium of radio communication
[short for radiotelegraphy]