Radio
/ˈɹeɪdiˌəʊ/
noun
The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves.
A device that can capture (receive) the signal sent over radio waves and render the modulated signal as sound.
On-board entertainment system in a car, usually including a radio receiver as well as the capability to play audio from recorded media.
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.”
To order or assist (to a location), using telecommunications.