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radio

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noun radio pronunciation in American English /ˈreɪdioʊ/ 
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singularradio
pluralradios
  1. 1
    [uncountable] a system of broadcasting information and programs that people can listen to

    National Public Radio

    He worked in radio for nearly 40 years.

    Radio and television have had an enormous effect on people's lives.

    1. a.
      [countable] a piece of equipment that you use for listening to radio programs

      a car radio

      turn on/off a radio:

      Let's turn on the radio. It's time for the news.

    2. b.

      the radio

      the programs that are broadcast for people to listen to

      I enjoy listening to the radio while I'm driving.

      on the radio:

      We heard a lot of flood warnings on the radio.

    3. c.
      [only before noun] relating to radio

      the radio news

      an independent radio station

  2. 2
    [uncountable] a system of sending and receiving spoken messages by using electronic signals, for example the system used by the police or pilots

    We remained in constant radio contact.

    by radio:

    We might be able to contact him by radio.

    Synonyms and related words for this sense of radio

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