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English definition of “expert”

expert

noun [C] uk   /ˈek.spɜːt/ us    /-spɝːt/
B1 a person with a high level of knowledge or skill relating to a particular subject or activity: a gardening/medical expert My mother is an expert at dress-making (= she does it very well).Experts and specialists

expert

adjective [before noun] uk   /ˈek.spɜːt/ us    /-spɝːt/
B2 having or showing a lot of knowledge or skill: The centre provides expert advice for people with financial problems. What's your expert opinion? an expert fishermanSkilled, talented and able
expertly
adverb uk   /-li/ us  
He carved the meat expertly.Skilled, talented and able
(Definition of expert from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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