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noun

the practice or science of communicating over a distance by converting sounds or signals into electromagnetic waves and transmitting these directly through space, without connecting wires, to a receiving set, which changes them back into sounds, signals, etc.
pl. radios such a receiving set, esp. one adapted for receiving the waves of the assigned frequencies of certain transmitters or broadcasting stations
1. broadcasting by radio as an industry, entertainment, art, etc.
2. all the facilities and related activities of such broadcasting

adjective

of, using, used in, sent by, or operated by radio
having to do with electromagnetic wave frequencies between c. 10 kilohertz and c. 300,000 megahertz

transitive verb, intransitive verb radioed, radioing

to send (a message, etc.) or communicate with (a person) by radio

See radio in American Heritage Dictionary 4

(rāˈdē-ō)

noun pl. ra·di·os

The wireless transmission through space of electromagnetic waves in the approximate frequency range from 10 kilohertz to 300,000 megahertz.
Communication of audible signals encoded in electromagnetic waves.
Transmission of programs for the public by radio broadcast.
a. An apparatus used to transmit radio signals; a transmitter.
b. An apparatus used to receive radio signals; a receiver.
c. A complex of equipment capable of transmitting and receiving radio signals.
a. A station for radio transmitting.
b. A radio broadcasting organization or network of affiliated organizations.
c. The radio broadcasting industry.
A message sent by radio.

verb ra·di·oed, ra·di·o·ing, ra·di·os

verb, transitive

To transmit by radio: radio a message to headquarters.
To transmit a message to by radio: radioed the spacecraft.

verb, intransitive

To transmit messages or a message by radio: a ship radioing for help.

See radio in Ologies

Radio

See also media.

phototelegraphy

the transmission of pictures, print, etc., by means of radio or telegraphy. —phototelegraphic, adj.

radiophony

radiotelephony. —radiophonic, adj.

radiotechnology

the science and technology of radio engineering. —radiotechnologic, radiotechnological, adj. See also radiation.

radiotelegraphy

1. the transmitting and receiving of messages by radiotelegraph.

2. the science and technology of the radiotelegraph. —radiotelegraphic, adj.

verbal communication at a distance by radio, using telephones. Also called radiophony. —radiotelephonic, adj.

telemechanics

the science of operating or controlling mechanisms by remote control, especially by radio.

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RADIO (abbreviation)

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radio (science)