- with absolute certainty
- as would be expected and is of no surprise
- can also be used as an informal affirmation that what you are saying is true
- used as a polite way of giving someone permission
- can also be used to mean "as luck would have it"
- Of course, I will help you to move. That's what friends are for.
- I can't believe that you doubted me. Of course, I remembered to bring your bag with me.
- He will, of course, be the first person out the door today. It is after all a long weekend.
- "Do you like my new hairstyle?" "Of course."
- "Could I please run in and use your printer? Mine has just broken." "Of course, help yourself."
- Of course, my car would be giving trouble today. As if I don't have enough to worry about.
The use was first recorder in 1548. It was used as a phrase meaning "belonging the ordinary procedure." It was also used to mean "natural order." As in, this is to be expected.
As a standalone idiom it was not used until the 1800s. It is a modified version of the original and means naturally, obviously. This is the manner in which it is used today.
1823: She made some very particular inquiries about my people, which, of course, I was unable to answer.