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Definition from macmillandictionary.com

radio

 
 
 
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noun British English pronunciation: radio /ˈreɪdiəʊ/ 
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singularradio
pluralradios
  1. 1
    [uncountable] Sound effect: radio a system of broadcasting information and programmes that people can listen to

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

    He worked in radio for nearly 40 years.

    BBC Radio 1

    1. a.
      [countable] Sound effect: radio a piece of equipment that you use for listening to radio programmes

      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 programmes 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.

This is the British English definition of radio. View American English definition of radio