noun The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves.
send a message by radio
noun A device that can capture (receive) the signal sent over radio waves and render the modulated signal as sound.
(of a song, person, etc.) to be on the radio
noun Any audio playing device, such as the on-board entertainment system in a car, usually including a radio receiver as well as the capability to play audio from recorded media; see also car radio.
noun A device that can transmit radio signals.
noun The continuous broadcasting of sound via the Internet in the style of traditional radio.
verb To use two-way radio to transmit (a message) (to another radio or other radio operator).
I think the boat is sinking; we'd better radio for help. / I radioed him already. / Radio the coordinates this time. / OK. I radioed them the coordinates.
verb To order or assist (to a location), using telecommunications.