knowledge - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “knowledge”

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knowledge

noun [U]  us   /ˈnɑl·ɪdʒ/
awareness, understanding, or information that has been obtained by experience or study, and that is either in a person’s mind or possessed by people generally: How will we use our increasing scientific knowledge? A lack of knowledge on the part of teachers is a real problem. He has a limited knowledge of French. The owner claims the boat was being used without her knowledge. It was common knowledge that Lucy was superstitious about the number 13.
(Definition of knowledge from the Cambridge Academic Content Dictionary © Cambridge University Press)
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