[win311fwg]

I only see one definition, which is the same definition it has always had: One person talking to one other person. Hence one to one for short.

There is no disagreement about that. The only difference in your case, as opposed to experiences others have had, is the dynamic between those two people. You are not seeking a meeting or want to have a meeting, thus the meeting is being called only for the benefit of the other person.

Let's simplify this: Nobody calls a meeting they don't find any value in. If someone is asking you to join a meeting, it is for them. It might also be for you if you both can see value, but that was said to not be the case in your case. When only the other party finds value, you are going to struggle to cut them off without some pushback, but this is where you can determine what value they are trying to get out of the meeting and see if there is a better way to deliver it.