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rock - definition and synonyms

 
 
 
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noun rock pronunciation in American English /rɑk/
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singularrock
pluralrocks
  1. 1
    [uncountable] the hard solid substance that forms part of the Earths surface
    Rainwater flows through soil and porous rock to reach underground streams.
    We had to dig down through a twelve-inch layer of rock.
    1. a.
      [countable] a large piece of stone lying on the ground
      She ran over the fallen rocks toward him.
    2. b.
      [countable] American a small stone
      Protesters threw rocks at the police.
    3. c.
      [countable] a large piece of stone that rises up from the ground or from under the ocean
      a castle built on a big rock
    4. d.

      rocks

      [plural] a group of rocks along the edge of the land or under the surface of the ocean
      The waves crashed against the rocks.
  2. 2

    rock

    or

    rock music

    [uncountable] rock music
    a rock star
    rock concerts
  3. 3
    [countable] informal a jewel, especially a diamond

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