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English definition of “known”

known

adjective [not gradable]  /noʊn/ us  

known adjective [not gradable] (HAVE UNDERSTANDING)

generally understood or proven: There is no known reason for the accident. It is a known fact that he started out a poor man. [+ to infinitive] These substances are known to cause skin problems.
(Definition of known from the Cambridge Academic Content Dictionary © Cambridge University Press)
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