radio

1. radio (noun) — sense 1

Definition: The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves.

Example: send a message by radio

2. radio (noun) — sense 2

Definition: A device that can capture (receive) the signal sent over radio waves and render the modulated signal as sound.

Example: (of a song, person, etc.) to be on the radio

3. radio (noun) — sense 3

Definition: A device that can capture (receive) the signal sent over radio waves and render the modulated signal as sound.: 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.

4. radio (verb) — sense 4

Definition: To use two-way radio to transmit (a message) (to another radio or other radio operator).

Example: 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.

5. radio (verb) — sense 5

Definition: To order or assist (to a location), using telecommunications.

Example: “Could you call them here? I'd like to talk to them. Or if they're out in the field, radio them in.”