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[rey-dee-oh] /ˈreɪ diˌoʊ/
noun, plural radios.
wireless telegraphy or telephony:
speeches broadcast by radio.
an apparatus for receiving or transmitting radio broadcasts.
a message transmitted by radio.
pertaining to, used in, or sent by radio.
pertaining to or employing radiations, as of electrical energy.
verb (used with object), radioed, radioing.
to transmit (a message, music, etc.) by radio.
to send a message to (a person) by radio.
verb (used without object), radioed, radioing.
to transmit a message, music, etc., by radio.
Origin of radio
1910-15; shortening of radiotelegraph or radiotelegraphy
Related forms
preradio, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for radioed


noun (pl) -os
the use of electromagnetic waves, lying in the radio-frequency range, for broadcasting, two-way communications, etc
Also called (esp Brit) wireless. an electronic device designed to receive, demodulate, and amplify radio signals from sound broadcasting stations, etc
a similar device permitting both transmission and reception of radio signals for two-way communications
the broadcasting, content, etc, of sound radio programmes: he thinks radio is poor these days
  1. the occupation or profession concerned with any aspect of the broadcasting of sound radio programmes: he's in radio
  2. (modifier) relating to, produced for, or transmitted by sound radio: radio drama
  1. of, relating to, employed in, or sent by radio signals: a radio station
  2. of, concerned with, using, or operated by radio frequencies: radio spectrum
(modifier) (of a motor vehicle) equipped with a radio for communication: radio car
verb -os, -oing, -oed
to transmit (a message) to (a person, radio station, etc) by means of radio waves
Word Origin
C20: short for radiotelegraphy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for radioed



"wireless transmission of voice signals with radio waves," 1907, abstracted from earlier combinations such as radio-receiver (1903), radiophone (1881), radio-telegraphy (1898), from radio- as a comb. form of Latin radius "beam." Use for "radio receiver" is first attested 1913; sense of "sound broadcasting as a medium" is from 1913.

It is not a dream, but a probability that the radio will demolish blocs, cut the strings of red tape, actuate the voice "back home," dismantle politics and entrench the nation's executive in a position of power unlike that within the grasp of any executive in the world's history. ["The Reading Eagle," Reading, Pa., U.S.A., March 16, 1924]
Wireless remained more widespread until World War II, when military preference for radio turned the tables. As an adjective by 1912, "by radio transmission;" meaning "controlled by radio" from 1974. Radio _______ "radio station or service from _______" is recorded from 1920. A radio shack (1946) was a small building housing radio equipment.



1916, from radio (n.). Related: Radioed; radioing.

Online Etymology Dictionary, © 2010 Douglas Harper
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radioed in Science
Noun  The equipment used to generate, alter, transmit, and receive radio waves so that they carry information.

Adjective  Relating to or involving the emission of radio waves.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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