I am just arguing the technicalities of language. But the point was that death and being dead is a permanent state wherein your body slowly decomposes and your brain ceases to function, and your consciousness ceases to exist (except in your afterlife). But once you are dead, you are dead and its not something you can recover from.
I noticed. I'm not sure you've noticed annoying a vampire, though. A vampire who knows the difference between true death, being undead, and being alive. A vampire who doesn't need a pathetic mortal to lecture her on the technicalities of life and death.
I'm tempted to give you to the Dawnguard so they can hammer it into you that vampires don't count among the living. And that vampires are dangerous monsters. Because we are. I try not to be, but deep down I am.
You tempt me to be that monster, mortal. I'd advise you to back off while your throat is still intact, and your blood still in your body, and your remains not temporarily raised for me to tear apart. Or maybe I'll enthrall you first, and make you suffer—
I'm sorry. I'm taking out my frustration on you, and it doesn't help that I'm hungry. I should find my Dragonborn and deal with that. But... I'm not talking about this with you anymore.
Patience is not really one of my virtues. You've reached the limits of mine, and you're testing my self control. Considering what will happen if it snaps... Well, you're welcome to find out.