American English

Definition of knowledge noun from the Oxford Advanced American Dictionary



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  1. 1[uncountable, singular] the information, understanding, and skills that you gain through education or experience practical/medical/scientific knowledge knowledge of/about something He has a wide knowledge of painting and music. There is a lack of knowledge about the tax system.
  2. 2[uncountable] the state of knowing about a particular fact or situation She sent the letter without my knowledge. The film was made with the Governor's full knowledge and approval. She was impatient in the knowledge that time was limited. I went to sleep secure in the knowledge that I was not alone in the house. They could relax safe in the knowledge that they had the funding for the project. He denied all knowledge of the affair.
  3. 3knowledge economy/industry/worker working with information rather than producing goods the emergence of consultancy as a knowledge industry the shift toward a knowledge economy
  4. Idioms
    be common/public knowledge
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    to be something that everyone knows, especially in a particular community or group Their relationship is common knowledge.
    come to somebody's knowledge (formal)
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    to become known by someone It has come to our knowledge that you have been taking time off without permission.
    to your knowledge
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    from the information you have, although you may not know everything “Are they divorced?” “Not to my knowledge.” She never, to my knowledge, considered resigning.
See the Oxford Advanced Learner's Dictionary entry: knowledge