Did you know?

Click any word in a definition or example to find the entry for that word

rock - definition and synonyms


What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



Thesaurus diagram

The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

noun     rock pronunciation in British English
Word Forms
  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

    [uncountable]Sound effect 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
quiz invitation
  • Facebook
  • Twitter


a description of an economic or political situation based on analysis of information at the present time

BuzzWord Article

Open Dictionary


an unregulated form of capitalism that features financial deregulation, privatisation and low tax for high earners

add a word


A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog
Macmillan learn live love play