of ˈcourse S1 W1 BrE AmE adverb
1 . used to show that other people probably already know what you are saying is true, or expect to hear it:
Well, she won, of course.
You should of course keep copies of all your correspondence.
Of course there will be some difficult times ahead.
2 . spoken ( also course informal ) used to emphasize that you are saying ‘yes’ when someone asks your permission to do something:
‘Can I ring you back in a minute?’ ‘Yes, of course.’
‘Is it OK if I have another cup of coffee?’ ‘Course, help yourself.’
3 . spoken ( also course informal ) used to emphasize that what you are saying to someone is true or correct:
‘Do you really believe her?’ ‘Of course I do!’
‘I hope this idea of yours works.’ ‘Course it’ll work.’
4 . spoken used to show that you accept or agree with what someone has just said:
‘Don’t get angry. She’s only 13.’ ‘Of course.’
‘The correct answer is 83.’ ‘Oh, yes, of course.’
5 . of course not/course not spoken used to emphasize that you are saying ‘no’ to something:
‘Have you been reading my email?’ ‘Of course not!’
‘Do you mind if I bring a friend?’ ‘No, of course not.’