Definition of radio
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
3a : of, relating to, or used in radio or a radio setb : specializing in radio or associated with the radio industryc (1) : transmitted by radio (2) : making or participating in radio broadcastsd : controlled or directed by radio
Explore Merriam-Webster
Origin and Etymology of radio
2radio or radio-
First Known Use: 1887
radio
Definition of radio
radios
1a : the wireless transmission and reception of electric impulses or signals by means of electromagnetic wavesb : 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
4a : a radio transmitting stationb : a radio broadcasting organizationc : the radio broadcasting industryd : communication by radio
Examples of radio in a Sentence
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.
Origin and Etymology of radio
short for radiotelegraphy
First Known Use: 1903
radio
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 in a Sentence
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.
1913
First Known Use of radio
1913
RADIO Defined for English Language Learners
radio
Definition of radio for English Language Learners
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: the system or process that is used for sending and receiving signals through the air without using wires
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: programs that are broadcast by radio
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: a device that is used to receive the signals that are broadcast by radio
radio
Definition of radio for English Language Learners
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: to send a message to someone by radio
RADIO Defined for Kids
Definition of radio for Students
radios
1 : the process that is used for sending or receiving signals by means of electromagnetic waves without a connecting wire
2 : a device that receives signals sent by radio
3 : programs that are broadcast by radio
4 : a device used to both send and receive messages by radio
5 : the radio broadcasting industry
Definition of radio for Students
1 : of or relating to radio waves
2 : of, relating to, or used in radio broadcasting
Definition of radio for Students
radioed
;radioing
: to communicate or send a message to by radio
Learn More about radio
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See words that rhyme with radio Spanish Central: Translation of radio Nglish: Translation of radio for Spanish speakers Britannica English: Translation of radio for Arabic speakers Britannica.com: Encyclopedia article about radio
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