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.



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 American English
Word Forms
  • Facebook
  • Twitter
  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 lying on the ground

      She ran over the fallen rocks toward him.

    2. b.
      [countable] American a small stone
    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.


      [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 music

    [uncountable]Sound effect rock music

    a rock star

  3. 3
    [countable] informal a jewel, especially a diamond
  4. From our crowdsourced Open Dictionary
    kick rocks to leave the current location; often used to express frustration by the resident as part of them telling another person to leave

    You've been nothing but trouble, so it's time for you to kick rocks!

    Submitted by Jason Renshaw (origin-old friend named Justin) from United States on 19/08/2014

Physical Cookie

a small electronic device which is taken into shops and links individual customers to advertisements …

BuzzWord Article

Open Dictionary


the act or practice of telling the future using random items such as playing cards

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