Bedeutung von “expert” — Learner’s Dictionary

expert

noun [ C ] us uk /ˈekspɜːt/

B1 someone who has a lot of skill in something or a lot of knowledge about something:

He's an expert on Japanese literature.
Show me how to use this computer - You're the expert.

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(Definition von “expert noun” aus dem Cambridge Learner's Dictionary © Cambridge University Press)