My encounters with the term are decidedly different. Nothing you say in this post convinces me otherwise. Otherwise you will just have to assume I am misleading you. I will do you the honor of not assuming you are misleading me about your researches in various documents. A usage inconsistent with the above.
Word can have more than one meaning, without having no meaning, or complete confused meanings.
I think it a grave intellectual problem if you cannot see this. I rather suspect you are simply being bloody-minded, which ismuch more admirable. Thank you for making my case for me. This was not your case. No one, myself included, ever denied this.