I completely failed to come up with a dictionary result, that would confirm the term explicitly means territorial concessions, and entire countries at that. You must be much wiser, and able to quote a dictionary saying that?
I seemed to find that it as a matter of fact can mean more than simply territorial concessions, such as material or political. Now, if one has every right to ask for say, 100 billion in damages caused, is it appeasement to forgo that, in order to not anger the hostile party any longer (thus hoping to avoid conflict)?
Oh, clearly not. It's all of Ukraine or nothing, right?