Radio

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Radio Meaning and Definition in Dictionary

Definitions from Wordnet 2.0


  • a communication system based on broadcasting electromagnetic waves
  • an electronic receiver that detects and demodulates and amplifies transmitted signals
  • medium for communication
  • transmit messages via radio waves; "he radioed for help"
  • indicating radiation or radioactivity; "radiochemistry"

Definitions from Wiktionary


  • medium for communication ,
  • an electronic receiver that detects and demodulates and amplifies transmitted signals ,
  • a communication system based on broadcasting electromagnetic waves

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Radio Meaning and Definition in Wikipedia


Radio is a way to send electromagnetic signals over a long distance, to deliver information from one place to another. A machine that sends radio signals is called a transmitter, while a machine that "picks up" the signals is called a receiver. (A machine that does both jobs is called a "transceiver".) When radio signals are sent out to many receivers at the same time, it is called a broadcast.

Television also uses radio signals to send pictures and sound. Radio signals can start engines moving so that gates open on their own from a distance. (See: Radio control.). Radio signals can be used to lock and unlock the doors in a car from a distance.

Sound can be sent by radio, sometimes through Frequency Modulation (FM) or Amplitude Modulation (AM).

Many people worked to make radio possible. After James Clerk Maxwell predicted them, Heinrich Rudolf Hertz in Germany first showed that radio waves exist. Guglielmo Marconi in Italy made radio into a practical tool of telegraphy, used mainly by ships at sea. He is sometimes said to have invented radio. Later inventors learned to transmit voices, which led to broadcasting of news, music and entertainment



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'Radio' example sentence in quotations


* My father hated radio and could not wait for television to be invented so he could hate that too. - Peter De Vries

* You see, wire telegraph is a kind of a very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this And radio operates exactly the same way you send signals here, they receive them there. The only difference is that there is no cat. - Albert Einstein

* If it weren't for Philo T. Farnsworth, inventor of television, we'd still be eating frozen radio dinners. - Johnny Carson


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Radio Sample Sentences in News



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