Meaning of “of course not” in the English Dictionary

american-english dictionary

"of course not" in British English

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of course not

A2 used to emphasize that you disagree or that something is not true:

"Where did you get the money? Did you steal it?" "Of course not. I borrowed it from Carol."

(Definition of “of course not” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"of course not" in American English

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of course not

definitely no or definitely not:

"The pie is delicious! Do you mind if I have a second helping? " "Of course not, I’m glad you like it."

(Definition of “of course not” from the Cambridge Academic Content Dictionary © Cambridge University Press)