Is it really “most war,” or is it one half of most wars?

But sure, that’s a fine definition. I think if you don’t include “justified” the definition is clearly incomplete - and I don’t think anyone who thinks about it would disagree, because it would contradict common usage so thoroughly.

So now you get to argue that killing foetuses is justified. Good luck with that, I’m sure the definitional exercise will have convinced whomever you were talking to :/