Definition of radio in US English:

radio

noun

  • 1The transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages.

    ‘cellular phones are linked by radio rather than wires’
    • ‘In other words, an efficiently coded radio message coming from outer space would look no different from a normal star in the sky.’
    • ‘The transmitter mixes the signal with some strong radio signals called carrier waves.’
    • ‘It involves sending anonymous text messages to other phones via Bluetooth short-range radio.’
    • ‘At about the same time, we were seeing an increase in radio transceivers and other radio sources.’
    • ‘You should always ensure car doors are locked and windows closed, and if possible maintain radio or telephone communications to report your movements.’
    • ‘It is highly improbable that both a telephonic transmission and radio transmission from the bank's alarm to the control room was blocked.’
    • ‘The information that they gather is then relayed back via radio or telephone communication equipment.’
    • ‘We had access to new information paths - the telegraph, telephone, radio, and television.’
    • ‘He liked to play with electricity when he was a youngster, and that grew into an interest in electronics and radio.’
    • ‘An atom will have many frequencies, some at radio wavelength, some in the visible spectrum, and some in between the two.’
    • ‘Scientists rely only on satellite telephone and radio connections.’
    • ‘Waves generated here penetrate the ocean to depths unreachable by radio and other communication waves.’
    • ‘The government responds by sending in the Delta Force, but loses contact as an eerie signal interrupts radio communications.’
    • ‘The only use I know of for very high power broadband radio transmissions is to transmit over extreme distances.’
    • ‘Now there are cell phones and radio so whatever happens everybody knows.’
    • ‘He operated radio links or sent messages using secret codes.’
    • ‘Through high frequency radio communication, the information is passed from the main terminal to the one at the PRS centre.’
    • ‘Echelon's network can intercept any international telephone call, email, fax or radio transmission.’
    • ‘My wife came home with a new Motorola cell phone with Bluetooth, which uses radio links to transfer data.’
    • ‘The result is that there is only room for a few players to offer a broadband internet service via radio.’
    1. 1.1 The activity or industry of broadcasting sound programs to the public.
      ‘she has written much material for radio’
      as modifier ‘a radio station’
      • ‘I firmly believe that they would love to increase the audience of people of color for public radio programming.’
      • ‘Two decades ago I achieved momentary fame for taping a promotion broadcast on our local public radio station.’
      • ‘Similar programmes would be generated for broadcast by radio.’
      • ‘But a public warning over radio wasn't broadcast for nearly ninety minutes.’
      • ‘In this business to broadcast 4,000 programmes on the same radio station is a remarkable achievement.’
      • ‘On both floors are the desks of the staff working on the news programme, website and radio station.’
      • ‘My wife told me she was amazed that I'd managed to find a sector of the broadcast industry that paid less than public radio.’
      • ‘Despite the billing, it sounds to me like any of the local public radio news and talk shows.’
      • ‘Though you might not be aware of it, only about a quarter of what you are likely to hear on any local public radio station is produced by NPR.’
      • ‘Britain's commercial radio broadcasting industry is soon likely to begin its long-expected consolidation.’
      • ‘He was part of a team that made one last futile attempt to force radio to embrace public interest programming.’
      • ‘He's also the host of the public radio program Studio 360.’
      • ‘It's so successful that public radio stations are hard-pressed to survive without it.’
      • ‘Gartner takes his pattern of repetition to a comic level in an editorial urging donations to the local public radio station.’
      • ‘It was the first convention to reach the general public live by radio broadcast.’
      • ‘I can also, of course, receive many of the digital radio programmes now being broadcast as channels on digital terrestrial and satellite platforms.’
      • ‘The first instance pertains to the cancellation of the live horseracing broadcasts on public radio stations.’
      • ‘The BBC initially broadcast one radio service, the National Programme, and some regional services.’
      • ‘The Hitch-Hiker radio show was broadcast in 12 episodes by BBC Radio 4.’
      • ‘Ken Crites, a Minot Daily News reporter who used to work in radio, also complained about the situation.’
    2. 1.2 Radio programs.
      ‘we used to listen to a lot of radio’
      • ‘This was a while ago for me and doing breakfast radio and raising a baby takes a lot of energy.’
      • ‘I used to listen to a lot of short-wave radio when I was in my teens.’
      • ‘But as I was saying - we listened to an awful lot of odd radio while we were moving and unpacking and looking for the stereo aerial.’
      • ‘I can remember the heady days of last Friday, putting together the 5pm bulletin for student radio.’
      • ‘That's why I love college radio, because a lot of times, those are the only stations that will play your stuff!’
      • ‘I have been listening to a lot of talkback radio, and actually reading newspapers.’
      • ‘Over the past few days I have done quite a lot of press, radio and little bits of television as well.’
      • ‘I covered a lot of pirate radio in Austin but my editor told me to cut that after a while.’
      • ‘I have been doing a lot of radio, which I enjoy because often the discussion can get to the bottom of things.’
      • ‘He's followed it up with appearances on talkback radio and he'll be on all the TV news bulletins tonight.’
      • ‘I used to do a lot of radio, and was proud to be nominated for a Sony.’
      • ‘A little like rhumba, Kokoliko has for some reason come to enjoy a lot of airplay on radio.’
      • ‘I heard a lot of radio yesterday because I had to drive to and from South Caulfield twice in as many days to get my MA thesis bound.’
      • ‘Its findings become subjects for conservative radio and cable talk shows.’
      • ‘These African actors say until their awareness campaign pays off, they'll pay the rent by working soap operas on radio.’
      • ‘I've been listening to a lot of radio in the car, and it's fascinating research to listen to what people are buying.’
      • ‘He continues to dominate breakfast radio with another record reach of 7.97 million.’
    3. 1.3 An apparatus for receiving radio programs.
      ‘she turned on the radio’
      • ‘We are tuned into a good programme on the radio, a kipper the size of a ship's lifebelt is gently grilling and I have a pot of tea mashing at my elbow.’
      • ‘He was the sort of person who would angrily thump the table and shout at the radio during political discussion programmes.’
      • ‘At the next stop light he deftly popped open the housing of the radio and switched something inside.’
      • ‘Talia turned up the volume on the radio and the following message could be heard coming out of it.’
      • ‘I heard a programme on the radio yesterday, an interview with a stand up comedian, Steve Day, who happens to be deaf.’
      • ‘When she heard a programme on the radio about the service she volunteered straightaway.’
      • ‘With a touch of a button located above the radio, Kantor can switch from diesel fuel to vegetable oil in seconds.’
      • ‘She reached towards the radio to switch off the song before the next verse, but she was too far away and her vision was blurred from tears.’
      • ‘Then each group's radios can be programmed to receive only specific talk groups.’
      • ‘On the train, I switched the radio on to a phone-in programme where listeners expressed their worries about the escalating situation.’
      • ‘She turned the radio on and switched it around until she found a good country station.’
      • ‘Ralph switched on the AM radio and spun the dial, looking for a news program.’
      • ‘The TV has been switched off and the radio has been silenced.’
      • ‘I started my car as I bit on my sandwich and almost mechanically switched on the radio.’
      • ‘The only count on which he was found not guilty was of stealing a mobile phone and car radio from Mr Ducey.’
      • ‘After the weather bulletin, Chris switched the radio off after the first few notes of the next song.’
      • ‘I was shocked to see the number of listeners who had switched off their radios in just 12 months.’
      • ‘Around half the radios switched on locally on a Saturday afternoon are tuned to the station's commentary.’
      • ‘Jude reached, turning on the radio and switching it to CD.’
      • ‘I enjoy the orchestra's programmes, both by way of live performance and by listening to them on the Concert Programme on the radio.’
      • ‘She switched off the radio and slowed the car in the silence.’
    4. 1.4 An apparatus capable of both receiving and transmitting radio messages between individuals, ships, planes, etc.
      ‘a ship-to-shore radio’
      • ‘Microlights can be flown anywhere outside controlled airspace and while most planes have one, a radio is not mandatory.’
      • ‘A voice barked through the radio from the command ship ordering her to fire.’
      • ‘While the men were trained in sabotage and to kill silently, the women operated radios and broadcast false messages.’
      • ‘The new radios transmit a code that can immediately be traced to the user.’
      • ‘I asked them to shake their heads if they heard me, but the radio apparently was not transmitting.’
      • ‘This cut the defenders off from each other, since they were not allowed to use radios in case their messages were picked up by the enemy.’
      • ‘He may have inadvertently broadcast the message because he did not know how to operate the radio and the intercom.’
      • ‘He was also passed a demodulator unit, which was to be connected to the short wave radio when a message was to be received.’
      • ‘It is well known that typical military broadband radios transmit only a few watts or less.’
      • ‘The radios also send text messages and updates on incidents, and there is an emergency button.’
      • ‘When the bomb went through the bomb bay door, number five ship called on the radio and informed us that we had a bomb bay door flapping in the breeze.’
      • ‘He stood there with a distant look in his eyes holding a radio in his hand that was spattering incomprehensible messages from his superiors.’
      • ‘The company commander loved it, yelling into the radio as each plane made its pass.’
      • ‘The necessary changes were made, the radio was installed in the nose, and the ship was ready for two-place flights.’
      • ‘The ship's radios would be on, but the running lights and the tower beacon would be secured.’
      • ‘The pilots screamed at ground staff over the radio to tow the planes to the gates before they lost total control of the situation.’
      • ‘The number is programmed into the radio and identifies the caller, which should eventually cut down on hoax distress calls.’
      • ‘With no radios capable of contacting the Paras in the town or in Amarra, the Redcaps were stranded.’
      • ‘He heard a message over the radio from a sailing boat not far behind his vessel.’
      • ‘The Marauders had been stripped to minimum weight to maximise fuel economy and for the same reason only the lead plane had a radio, a fatal factor in thick fog.’
    5. 1.5in names A broadcasting station or channel.
      ‘Monitor Radio’
      • ‘Clear Channel radio owns almost any station you could be listening to in any market.’
      • ‘The choir has regularly broadcast on RTE radio and television.’
      • ‘The finals are broadcast on BBC radio and television.’

Origin

Early 20th century: from radio- in radiotelegraphy and radio-telegram, based on Latin radius ‘ray, beam’.

Pronunciation

radio

/ˈrādēō//ˈreɪdioʊ/