Well done E.O.M, with that truthful definition of what JW's believe an Apostate is, as with many words they have appropriated, not a definition the rest of the world would recognise.
"Apostate" is used, by the WT writers and JW's themselves, to demonize any opinion or set of facts that exposes the J.W religion for what it is.
It is a "thought stopper"/ Mind Control technique that has tremendous power over the JW's.