Did you know?

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

knowledge - 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 knowledge pronunciation in British English /ˈnɒlɪdʒ/
  • Facebook
  • Twitter
  1. 1
    [singular/uncountable] all the facts that someone knows about a particular subject

    The teacher’s comments are designed to help improve your knowledge and understanding.

    knowledge of/about:

    Solicitors should possess detailed knowledge of certain aspects of the law.

    Candidates for the job must have a working knowledge of at least one European language.

    1. a.
      all the facts that are known about different things or about life generally

      the pursuit of knowledge

  2. 2
    [uncountable] the fact that someone knows about something, especially something bad

    We had no knowledge of the incident.

    knowledge of:

    Daniels has denied all knowledge of the events.

    knowledge that:

    The staff had no knowledge that the company was in trouble.

    in/with the knowledge that:

    I say this in the knowledge that nothing will be done.



a title used before a man or woman's name as a gender-neutral alternative to Mr, Ms, etc

BuzzWord Article

Open Dictionary


another way of saying congratulations, or that something/someone looks nice or fascinating

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