Definitions from Wiktionary (radio)

▸ noun:  (uncountable) The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves.
▸ noun:  (countable) A device that can capture (receive) the signal sent over radio waves and render the modulated signal as sound.
▸ noun:  (countable) 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:  (countable) A device that can transmit radio signals.
▸ noun:  (Internet, uncountable) The continuous broadcasting of sound via the Internet in the style of traditional radio.
▸ verb:  (ambitransitive) To use two-way radio to transmit (a message) (to another radio or other radio operator).
▸ verb:  (transitive) To order or assist (to a location), using telecommunications.

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