rock - definition and synonyms


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  1. 1
    [uncountable] the hard solid substance that forms part of the Earth’s surface

    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

    2. b.
      [countable] a large piece of stone lying on the ground

      She ran over the fallen rocks towards him.

    3. c.


      [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
  2. 2



    rock music


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    rock music

    a rock star

  3. 3
    [uncountable] British a hard sweet in the shape of a solid tube called a stick. Rock is usually sold in seaside towns and has the name of the town written in it.
  4. 4
    [countable] informal a jewel, especially a diamond