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English definition of “expert”

expert

noun [C]    /ˈek·spɜrt/
a person having a high level of knowledge or skill in a particular subject: He is the administration’s foreign-policy expert for eastern Europe. expert    /ˈek·spɜrt, ɪkˈspɜrt/ adjective [not gradable] She’s an expert swimmer. expertly    /ˈek·spɜrt·li, ɪkˈspɜrt·li/ adverb [not gradable]
(Definition of expert noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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