Did you know?

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

breach - 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 [countable] breach pronunciation in British English /briːtʃ/
Word Forms
  • Facebook
  • Twitter
  1. 1
    a failure to follow a law or rule
    breach of:

    Reproduction of the CD constitutes a breach of copyright.

    be in breach of something:

    The company was found to be in breach of environmental regulations.

    1. a.
      a failure to do something that you have promised to do or that people expect you to do
      breach of contract:

      If you don’t deliver on time, you could be sued for breach of contract.

      breach of trust/confidentiality:

      a clear breach of patient confidentiality

    2. b.
      a situation in which someone does something that goes against accepted rules of social behaviour

      an embarrassing breach of etiquette

  2. 2
    formal a serious disagreement

    This could lead to a major breach in our relationship with China.



to fall over forwards so that your face hits the ground or another surface

BuzzWord Article

Open Dictionary


the activity of exploring abandoned buildings and other manmade structures

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