English▸ noun
(plural radios)
the transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages: cellular phones are linked by radio rather than wires.
▪ the activity or industry of broadcasting sound programs to the public:
she has written much material for radio
[as modifier] a radio station.
▪ radio programs:
we used to listen to a lot of radio.
▪ an apparatus for receiving radio programs:
she turned on the radio.
▪ an apparatus capable of both receiving and transmitting radio messages between individuals, ships, planes, etc.:
a ship-to-shore radio.
▪ [in names] a broadcasting station or channel:
Monitor Radio.
▸ verb
(radioes, radioing, radioed)
[no object] communicate or send a message by radio: the pilot radioed for help.
▪ [with object] communicate with (a person or place) by radio:
we'll radio Athens right away.
– ORIGIN early 20th century : from radio- in radiotelegraphy and radio-telegram, based on Latin radius ‘ray, beam’.