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radio

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noun American English pronunciation: radio /ˈreɪdioʊ/ 
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singularradio
pluralradios
  1. 1
    [uncountable] Sound effect: radio 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] Sound effect: radio 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

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