radio

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.

A device that can transmit radio signals.

The continuous broadcasting of sound via the Internet in the style of traditional radio.

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.