- 1the radio [uncountable, singular] the activity of broadcasting programs for people to listen to; the programs that are broadcast The interview was broadcast on radio and television. The play was written especially for radio. I listen to the radio on the way to work. Did you hear the interview with him on the radio? local/national radio a radio program/station satellite radio
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- 2[countable] a piece of equipment used for listening to programs that are broadcast to the public to turn the radio on/off a car radio see clock radio
- 3[uncountable] the process of sending and receiving messages through the air using electromagnetic waves He was unable to contact Blake by radio. to keep in radio contact radio signals/waves
- 4[countable] a piece of equipment, for example on ships or planes, for sending and receiving radio signals to hear a gale warning on/over the ship's radio
Check pronunciation: radio