Yes, we do disagree. The quote/definition/whatever shows that the term is much more general that for the specific case you use it for. Just because that's the only way you've seen the term used until now doesn't mean that's the only use for it. It is indeed a general term for any stationary vortex.


However, there's no reason a real bound vortex cannot be incorporated into the virtual bound vortex used to calculate circulation. That's more a limitation of the method/derivation than the actual physics.

I'm done.