1.
(also course ) ( informal ) used to emphasize that what you are saying is true or correct :
'Don't you like my mother?' 'Of course I do!'
'Will you be there?' 'Course I will.'
2.
(also course ) ( informal ) used as a polite way of giving sb permission to do sth :
'Can I come, too?' 'Course you can.'
'Can I have one of those pens?' 'Of course—help yourself.'
3.
( informal ) used as a polite way of agreeing with what sb has just said :
'I did all I could to help.' 'Of course,' he murmured gently.
4.
used to show that what you are saying is not surprising or is generally known or accepted :
Ben, of course, was the last to arrive.
Of course, there are other ways of doing this.