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sound - definition and synonyms


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noun sound pronunciation in American English /saʊnd/
Word Forms
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  1. 1
    [countable] something that you can hear
    sound of:

    the sound of voices/laughter/footsteps

    not make a sound (=be very quiet):

    Laura didn’t make a sound as she left the room.

    1. a.
      [uncountable] energy that travels through air or water and that a human ear can hear

      The aircraft could travel faster than the speed of sound.

  2. 2
    [uncountable] the music, talking, and other noises that come from a radio, television, movie, etc.

    Something was interfering with the sound during the broadcast.

    1. a.
      [uncountable] the loudness of a radio, television, etc.

      Turn the sound up a little – I can’t hear.

  3. 3
    [countable] the particular musical style of a person, band, or place

    He plays an original jazz-gospel sound.

  4. 4
    [countable] a long narrow area of water that connects two larger areas of water
  5. 5


    [plural] British informal tunes

sea lion

in an online conversation, repeatedly asking a person questions which suggest that you are interested in what they are talking about, but are actually intended to annoy them

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an electric skateboard

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