radio

¹ra·dio

adjective \ˈrā-dē-ˌō\

Definition of RADIO

1

: of, relating to, or operated by radiant energy

2

: of or relating to electric currents or phenomena (as electromagnetic radiation) of frequencies between about 3000 hertz and 300 gigahertz

3

a : of, relating to, or used in radio or a radio set

b : specializing in radio or associated with the radio industry

c (1) : transmitted by radio (2) : making or participating in radio broadcasts

d : controlled or directed by radio

Origin of RADIO

²radio or radio-

First Known Use: 1887

Other Telecommunications Terms

Ethernet, intercept

Rhymes with RADIO

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²radio

noun

plural ra·di·os

Definition of RADIO

1

a : the wireless transmission and reception of electric impulses or signals by means of electromagnetic waves

b : the use of these waves for the wireless transmission of electric impulses into which sound is converted

2

: a radio message

3

: a radio receiving set

4

a : a radio transmitting station

b : a radio broadcasting organization

c : the radio broadcasting industry

d : communication by radio

Examples of RADIO

1. The news was sent by radio.
2. I listen to the radio all the time.
3. I heard the news on the radio.
4. There's a problem with the car's radio.
5. The radio was playing very loudly.
6. The pilot's radio wasn't working.

Origin of RADIO

short for radiotelegraphy

First Known Use: 1903

Other Telecommunications Terms

Ethernet, intercept

³radio

verb

Definition of RADIO

transitive verb

1

: to send or communicate by radio

2

: to send a radio message to

intransitive verb

: to send or communicate something by radio

Examples of RADIO

1. The police radioed for backup.
2. The stranded sailors were radioing for help.
3. The pilot radioed in to the control tower.
4. The police radioed a report back to the station.
5. They radioed the Coast Guard for help.

First Known Use of RADIO

1913

Other Telecommunications Terms

Ethernet, intercept

radio

noun    (Concise Encyclopedia)

Electromagnetic radiation of lower frequency (hence longer wavelength) than visible light or infrared radiation, and consisting of the range of frequencies used for navigation signals, AM and FM broadcasting, television transmissions, cell-phone communications, and various forms of radar. For radio transmission, information is imparted to a carrier wave by varying (modulating) its amplitude, frequency, or duration. The technology of radio arose from the work of Michael Faraday, James Clerk Maxwell, Heinrich Hertz, Guglielmo Marconi, and others, and improvement followed the development of the vacuum tube, the electronic-tube oscillator, the tuned circuit, and other components. Later innovations have included the replacement of tubes by transistors and of wires by printed circuits. See also radio and radar astronomy.