radio

adj. pertaining to radio; broadcast via radio; pertaining to or based on radio waves

n. method of transmitting sound via electromagnetic waves; device used to receive and play radio broadcasts

v. broadcast by radio, transmit by radio

Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. It does not require a medium of transport. Information is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude or their frequency. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor. This can be detected and transformed into sound or other signals that carry information.
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Noun
1. medium for communication
(synonym) radiocommunication, wireless
(hypernym) broadcasting
(class) raise
2. an electronic receiver that detects and demodulates and amplifies transmitted signals
(synonym) radio receiver, receiving set, radio set, tuner, wireless
(hypernym) receiver, receiving system
(hyponym) clock radio
(part-holonym) wireless
(part-meronym) amplifier
3. a communication system based on broadcasting electromagnetic waves
(synonym) wireless
(hypernym) communication system
(hyponym) radiotelegraph, radiotelegraphy, wireless telegraph, wireless telegraphy
(part-meronym) radio receiver, receiving set, radio set, tuner, wireless
Verb
1. transmit messages via radio waves; "he radioed for help"
(hypernym) communicate, intercommunicate
(derivation) wireless
Adjective
1. indicating radiation or radioactivity; "radiochemistry"
(pertainym) radiant energy
(classification) combining form

n. radio, method of transmitting sound via electromagnetic waves; device used to receive and play radio broadcasts, radio receiver, device that changes electrical waves into sound

n. radio, radiography, wireless