Your definition is the only really meaningful and defensible definition. But that's not the point. The point is that even though there is a "correct" definition

Your definition is the only really meaningful and defensible definition. But that's not the point. The point is that even though there is a "correct" definition, the term is still useless because people use it to mean a million different things. And that won't change... the toothpaste is out of the tube, as they say.