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English definition of “layman”

layman

noun [C]  /ˈleɪ·mən/ (also layperson,  /ˈleɪˌpɜr·sən/, laywoman,  /ˈleɪ·wʊm·ən/) us  
a person who is not trained in or does not have a detailed knowledge of a particular subject: The book is supposed to be the layman’s guide to home repair. A layman or layperson is also a member of a religion who is not a member of the clergy.
(Definition of layman from the Cambridge Academic Content Dictionary © Cambridge University Press)
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