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English definition of “of course”

of course

A1 informal used to say 'yes' or to give someone permission to do something: "Can you help me?" "Of course." "May I have a look at your newspaper?" "Of course you can." "Have you written your English essay yet?" "Of course, I finished it last week." B1 used to show that what you are saying is obvious or already known: The Second World War ended, of course, in 1945. used to show that a situation or a piece of information is not surprising: We arrived at the restaurant 30 minutes late so, of course, our reservation had been cancelled.
(Definition of of course from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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