"the primary term/phrase in question is the definition of "Flash Memory" (corrections welcomed). How many variations of definition could there possibly be?"

one:

"block erasable non-volatile memory"

there's meat on the bones......

go for it.....there is no regret of the company management to put it all on the line.

Take it all the way baby .....micro-controller:memory...logical / physically managed storage elements....and caching schemes.....and wrap it all around their collective necks.

doni