radio

1 of 4

adjective

ra·​dio ˈrā-dē-ˌō How to pronounce radio (audio)
1
: of, relating to, or operated by radiant energy
2
: of or relating to electric currents or phenomena (such 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

radio

2 of 4

noun

plural radios
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

radio

3 of 4

verb

radioed; radioing; radios

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

radio-

4 of 4

combining form

see radi-

Examples of radio in a Sentence

Noun The news was sent by radio. I listen to the radio all the time. I heard the news on the radio. There's a problem with the car's radio. The radio was playing very loudly. The pilot's radio wasn't working. Verb The police radioed for backup. The stranded sailors were radioing for help. The pilot radioed in to the control tower. The police radioed a report back to the station. They radioed the Coast Guard for help.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
The first night of two Apollo weekend shows presented by SiriusXM, featured the 36-year-old ripping off songs at a frantic pace — most with just a verse and chorus — satisfying day-one fans with fan-favorite, deep non-radio cuts as well as those only familiar with his No. 1 hits. Gary Gerard Hamilton, Chicago Tribune, 22 Jan. 2023 Pence is a 61-year-old former Indiana governor, former member of Congress, an ex-radio host and an evangelical Christian. Arkansas Online, 8 Oct. 2020
Noun
Linkin Park’s last local gig came as part of radio station Live 105’s old Not So Silent Night holiday showcase at Oakland Arena on Dec. 12, 2014. Jim Harrington, The Mercury News, 14 Nov. 2024 The increase is attributed to shipments of BKR 5000 radio products. Quartz Bot, Quartz, 14 Nov. 2024
Verb
For their first lunch, Aesha holds off on service because the wind knocks over a glass, radioing the stews to stand by, but Ellie thinks they’re supposed to start running plates. Emma Soren, Vulture, 2 Sep. 2024 Lion radioed Ivan to advance anyway, and Ivan passed the command down the line. Sarah A. Topol, New York Times, 20 Sep. 2024 See all Example Sentences for radio 

Word History

Etymology

Noun and Adjective

short for radiotelegraphy

First Known Use

Adjective

1887, in the meaning defined at sense 1

Noun

1903, in the meaning defined at sense 1a

Verb

1913, in the meaning defined at transitive sense 1

Time Traveler
The first known use of radio was in 1887

Dictionary Entries Near radio

Cite this Entry

“Radio.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radio. Accessed 21 Nov. 2024.

Kids Definition

radio

1 of 4 noun
ra·​dio ˈrād-ē-ˌō How to pronounce radio (audio)
plural radios
1
: the sending or receiving of signals using electromagnetic waves without a connecting wire
radio includes television and radar
especially : the use of these waves to carry sound that has been changed into electrical energy
2
: a radio receiving set
a transistor radio
3
: the radio broadcasting industry

radio

2 of 4 adjective
1
: of, relating to, or operated by radiant energy especially at radio frequencies
2
: of, relating to, or used in radio or a radio
radio commercials

radio

3 of 4 verb
: to communicate or send a message to by radio

radio-

4 of 4 combining form
1
: radiant energy : radiation
radioactive
2
: radioactive
radiocarbon
Etymology

Noun

a shortened form of radiotelegraphy, literally, "telegraphy by rays"; radio- from French radio- "radial, radiating," from Latin radius "ray, beam, spoke" — related to radiate, radius, ray entry 2

Combining form

derived from Latin radius "ray, beam, spoke"

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