Metaphysics is an old-school branch of philosophy that chews on the big issues that can’t really be solved, thereby allowing debates to rage for centuries.
Abstract concepts such as being, knowing, identity, time and space; these keep some academics metaphysically enthralled for their whole lives. Or so they claim.
What has metaphysics got to do with physics, you may ask?
Well, according to Wiki, meta is a prefix that is used to (a) indicate a (b) concept which is an (c) abstraction from (d) another concept, used to (e) complete or (f) add to the (g) latter concept.
BTW I added the indices there just to highlight how fucked up that definition is. It’s a sort of circle that manages to disappear right in front of your eyes, just as you are contemplating it.
And still no light is shed on what metaphysics has to with physics; the domain of equations, things and, more latterly, non-things; practised by people that have trouble communicating and selecting clothes.
I’d say that this is a case of trademark infringement hiding behind a facade of a linguistic mash-up that wouldn’t even get past first base were the practitioners of the same willing to stop and contemplate their very own augmentation.
Worth noting is that, from time to time, the odd physicist, that has run out of mathematical juices, metamorphoses into a metaphysicist.(that’s two metas in one sentence!)
Think of that bloke in a wheel chair with very bad teeth, or that other one that is valiantly trying to squeeze god into textbooks, or even that old bloke way back, with the bleached medusa of a hairstyle who peaked at the age of 7 or thereabouts.
Right there, I suspect, is where the term metaphysics originated.
Try this out; a metaphysicist is a dishonestly retired physicist that has checked out and is now publicly pondering life, the universe and everything and, by their very means of communications, they imply that their random musings are an abstraction from their former discipline of physics, and therefore useful for placing all that physics into a useful context for all those non-physicists and physicists alike.
Once these guys started attracting attention I suspect that others started doing the same without first doing the physics. A much simpler approach that avoided all those wasted years of physics, and they did a better job.
Not that anyone noticed or cared.