What does this phrasal verb mean "to make for"? Is it an idiom?

[Mister Micawber]

I was unable to accept an invitation at such a short notice.
I was unable to accept an invitation because of business.
_________________
Native English teacher at Mister Micawber's

[Davidwang512]

According to the replies above, can we say that "making for a certain place" and "leaving for a certain place" mean the same thing?
thank you very much for your reply!
David

[Mister Micawber]

Not really. 'Make for' shows a strong goal-oriented attitude, and it can be used at any stage of the journey.
_________________
Native English teacher at Mister Micawber's