Cap'n,
It's not my definition - but it appears to be the only official one we have. As I have said, I think it merits examination and probably alteration, but I don't think it can be ignored, simply because it's the one that identified the music we signed up for forty years ago.
Any alteration needs to be mutually agreed on otherwise we stop communicating.
If you want to make a case for jazz, fine; I was going to The cavern in Liverpool in the early sixties to listen to "traditional jazz", but even in those days jazz had divided itself up into 'traditional', 'modern', 'big band' and other branches to identify the different categories.
I think I wrote earlier that "human beings put labels on things so they know what tin to open".
The labels are not a value judgement but a form of agreement that we are all talking about the same thing. I believe that thousands of people, myself included, walked away from the folk clubs because the labeling system broke down and we no longer knew what we were going to hear when we attended one.
Jim Carroll