I hate to post what is nearly a "me too", but I'd also like to ask that question, with the clarification that I do not mean it as a rhetorical equivalent of "No, of course it's not instantaneous, duh", I am genuinely curious where the sheer confidence of the definition of "teleportation" as "instantaneous in violation of relativity" suddenly came from. Is there some scifi show on TV that I'm not watching that is promulgating this interpretation or something? I've seen the belief that entanglement can be used for FTL communication going back unto yea the very beginnings of the internet but this solid and shared definition of instantaneous is new to me vs. even the iteration of this whole argument I saw a few months ago. (Fringe maybe? Haven't started that yet.)
I have had this conversation twice a year for the past ten to fifteen years. Something needs to have changed, because the conversation has changed in the way I cited. The vast bulk of those don't even address whether it's "instantaneous" in violation of lightspeed because they just ignore lightspeed entirely. You in fact seem to be reinforcing my point by the casual assumption that teleportation must be instantaneous-as-FTL by the very definition of the word, and thus the mere fact that the word is used proves your point (circularly, I might add), so let me ask you: Where did you get that idea? It's not the way the word has been defined for the past 50 years, it's a new mutation. Why do you think that? (And why would English have such a rigid, useless definition for a word like that?)