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rock

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noun rock pronunciation in British English /rɒk/ 
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singularrock
pluralrocks
  1. 1
    [uncountable] the hard solid substance that forms part of the Earth's 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 that rises up from the ground or from under the sea

      a castle built on a big rock

      the Rock of Gibraltar

      Synonyms and related words for this sense of rock
    2. b.
      [countable] a large piece of stone lying on the ground

      She ran over the fallen rocks towards him.

      Synonyms and related words for this sense of rock
    3. c.

      rocks

      [plural] a group of rocks along the edge of the land or under the surface of the sea

      The waves crashed against the rocks.

    4. d.
      [countable] American a small stone

      Protesters threw rocks at the police.

      Synonyms and related words for this sense of rock
  2. 2

    rock

    or

    rock music

    [uncountable] rock music

    a rock star

    rock concerts

    Synonyms and related words for this sense of rock
  3. 4
    [countable] informal a jewel, especially a diamond
    Synonyms and related words for this sense of rock

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