radio

Meanings

1. 1
   adj

   indicating radiation or radioactivity

   radiochemistry

2. 2
   verb

   transmit messages via radio waves

   I radioed for help.

3. 3
   noun

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

   send a message by radio

4. 4
   noun

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

   We heard a lovely song on the radio.

5. 5
   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.

   David Bowie's classic hit Space Oddity will be looping on the radio as the car is hurled into an elliptical orbit that stretches out to Mars' orbit around the Sun.

6. 6
   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.

7. 7
   verb

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

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

8. 8
   noun

   a communication system based on broadcasting electromagnetic waves

Etymology

Short for radiotelegraphy.