Definition of sound noun from the Oxford Advanced American Dictionary

      

    sound

     noun
    noun
    NAmE//saʊnd//
     
     
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    something you hear
  1. 1[countable] something that you can hear synonym noise a high/low sound a clicking/buzzing/scratching, etc. sound the different sounds and smells of the forest She heard the sound of footsteps outside. He crept into the house trying not to make a sound.
  2. 2 [uncountable] continuous rapid movements (calledvibrations) that travel through air or water and can be heard when they reach a person's or an animal's ear Sound travels more slowly than light. Which Word?noise / sound Noise is usually loud and unpleasant. It can be countable or uncountable:Try not to make so much noise. What a terrible noise! Sound is a countable noun and means something that you hear:All she could hear was the sound of the waves.You do not use words like much or a lot of with sound.
  3. from television/radio
  4. 3 [uncountable] what you can hear coming from a television, radio, etc., or as part of a movie Could you turn the sound up/down? The sound quality of the tapes was excellent.
  5. of musicians
  6. 4[countable, uncountable] the effect that is produced by the music of a particular singer or group of musicians I like their sound.
  7. impression
  8. 5[singular] the sound of something the idea or impression that you get of someone or something from what someone says or what you read They had a wonderful time by the sound of it. From the sound of things you were lucky to find him. They're consulting a lawyer? Idon't like the sound of that.
  9. water
  10. 6[countable] (often in place names) a narrow passage of water that joins two larger areas of water synonym strait Plymouth Sound
  11. Idioms
    like, etc. the sound of your own voice(disapproving)
     
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    to like talking a lot or too much, usually without wanting to listen to other people She's much too fond of the sound of her own voice.
See the Oxford Advanced Learner's Dictionary entry: sound