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English definition of “radio”

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radio

noun [C/U]  /ˈreɪ·diˌoʊ/ ( plural radios) us  
a device for receiving, and sometimes broadcasting, sound messages, or the receiving or sending of sound messages: [C] I listen to the radio in the morning to get the weather report. Radio is also the work of broadcasting sound programs for the public to listen to. physics Radio waves are the energy waves of a certain length that are used in radio broadcasts.

radio

verb [I/T]  /ˈreɪ·diˌoʊ/ ( present participle radioing, past tense and past participle radioed) us  
to send a message to someone by radio: [I/T] They radioed (their base) for help.
(Definition of radio from the Cambridge Academic Content Dictionary © Cambridge University Press)
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