Oh dear. Let's take a look at this shall we?

I think it's a mistake I've seen atheists often make to define the supernatural as that "which is not natural" or that which "defies the laws of physics."

Actually, what you will find, if you bother to do your research, is that this is how a good many supernatualists themselves define "supernatural". Indeed, some of the more febrile Christian fundamentalists in the USA actively rail against testable natural processes, despite the demonstrable success of these in providing explanations for relevant classes of entities and phenomena. In short, these are people who think the universe runs on magic. All that has happened, is that atheists, including the two you have cited, have taken this position on the part of supernaturalists at face value, and based their critique on the fact that said supernaturalists hold this view.

The prefix "super" means above, or transcendent of, and it's not like the prefix "a-" in atheism, to mean "without" or "not." It is not the negation of the natural, but an expression of transcendence

Once again, you have the observational data from those supernaturalists I cited above to contend with here, and the fact that critique of the view that they expound arises not from atheist fabrication, but from honest addressing of supernaturalist assertions. Of course, there's the additional problem that all too frequently, attempts to find out what supernaturalists actually think, leads to the conclusion that they haven't actually given their ideas much thought at all, because they are completely unaware of problems arising from their own, frequently naive and ill-considered, definitions.

By the way, your apologetics above is, at bottom, more of the same failure to apply rigour to the matter. What you are asserting with this 'transcendence' sophistry and rhetorical spell, is that natural processes are somehow confined to a limited arena of action, beyond which they cannot operate, and that purportedly "supernatural" processes are therefore needed to operate outside that arena of action. And in doing so, you are asserting directly, that said "supernatural" processes are not natural. It doesn't matter how much word salad you spin off this assertion to try and avoid that conclusion, that conclusion is plain to see by anyone who has bothered to pay attention in class.

it is the mystical experience of the mystic in which they have an experience that is outside of space and time within a phenomenon in consciousness

And right on cue, here comes the very meaningless word salad to try and avoid that conclusion. First of all, you have the problem of defining precisely what is actually meant by being "outside of space and time", a task that serious thinkers realised some time ago opens up all manner of cans of worms if not approached with care. Second, just because something occurs in the television inside someone's head, doesn't mean for one moment that said occurrence is anything other than a mental hologram, with no actual concrete substance outside the firing of the requisite neurons.

In the case of the second objection above to your word salad, I can point to a very specific instance of my own, where, in 1994, I was taken to hospital suffering from meningococcal meningitis. During my tenure at said hospital, I noticed that my recorded body temperature was 104°F, which is not a good temperature for the human brain to operate at. Indeed, when one's neurons are being slowly cooked in such a high fever, interesting aberrations of normal cognitive processing start coming to the fore, including some fairly juicy hallucinations. In my case, the hallucination that chose to enter stage left, as it were, centred upon me seeing the nurse taking my various medical statistics as a six foot tall cockroach. Now at this point, quite a few people would probably have leapt out of the bed screaming upon seeing a sight of this nature, but in my case, having spent a significant part of my adult life studying invertebrate zoology, left me lying there instead thinking "I know that this isn't for real, but while I'm seeing this weirdness, I might as well put it to good use", whereupon I started asking myself what species of cockroach I was hallucinating. I spent an interesting half hour trying to make sense of the anatomical details of my hallucinated six foot cockroach, but the antibiotics and anti-fever meds kicked in before I arrived at a conclusion.

Now I don't even need to be an invertebrate zoologist, or have familiarity with the underlying physiology of insects, to know that six foot cockroaches aren't real entities, at least, not in the present day, though the Carboniferous era could have produced some oversized ancestral ones for palaeontologists to dig up. But, said knowledge came in pretty handy for handling that hallucination with a certain degree of equanimity. I now know that if I don't handle a similar situation in future with the same aplomb, then I'll be in truly serious medical trouble.

Indeed, so hilarious was my previous rendition of this episode elsewhere, that I can now guarantee a smile, whenever I am confronted by someone claiming to have some "mystical" visions in that particular arena, and reply to them with "Do I have to hit you over the head with my six foot cockroach?" I have much fun breaking this out whenever the occasion warrants, and you have merely been the latest in a long line of unsuspecting individuals who have tripped the requisite wire.

Oh, and given some of the, shall we say, interesting entities that have put in an appearance during my dreams, which have included my aquarium fish leaving their tank and swimming around in mid-air, it's safe to say that when it comes to the generation of some truly left-field virtual reality CGI, my endorphins are quality ones. As a corollary, I have a nice body of data to the effect that said endorphins are probably overactive in certain individuals, when they start imagining that they're seeing someone in white robes floating in front of them. Though the truly imaginative would, instead of talking to the laughable caricature Aryan Jesus that has been doing the rounds of European art for 500 years, be holding conversations with hovering trilobites or overgrown Warnowiids, which, I shall inform you at this point, are far weirder real life organisms than anything dreamt up by weed-heads. What you have in the case of Warnowiids, is, in effect, a group of plants with eyeballs, though they're actually microscopic in size. Before you ask how a single celled plant can have an eyeball, yes, it is possible, and what's more, that eyeball is comparable in sophistication to the vertebrate eye. Oh, of course, being single celled, Warnowiids don't have a brain to process the visual data. Scientists are still working out how they do this.

So, in short, I've seen enough natural weirdness to know that supernaturalist fabrications are, in general, woefully dull in comparison. Don't make the mistake of asking me about invertebrate sex lives unless you want to blow an artery reading my account.

And with that, it's time for me to move on. No, I am not smoking illicit hallucinogens, the diligent can check all of the above with relatively little effort if they so wish.