radio

noun (plural radios)

• 1 [mass noun] the transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages:cellular phones are linked by radio rather than wires

• 2 [mass noun] the activity or industry of broadcasting sound programmes to the public:she has written much material for radio [as modifier]:a radio station
• radio programmes:we used to listen to a lot of radio
• [in names] a broadcasting station or channel:Radio One

• 3an apparatus for receiving radio programmes:he switched the radio on
• an apparatus capable of both receiving and transmitting radio messages between individuals, ships, planes, etc.:a ship-to-shore radio

verb (radioes, radioing, radioed)

• communicate or send a message by radio:we radioed for help
• [with object] communicate with (a person or place) by radio:we’ll radio Athens right away