When I use the term NT, it's is a general term for anyone that isn't on the spectrum. I do know that, when it comes down to it, whenever we use the term NT we run the risk of actually coming out false (in a possible scenario that the person we're calling an NT actually is not Neurotypical). In fact, sometimes I imagine a Schitzophrenic could accidentally be called an NT, due to a lack of better wording. For the general use of NT, this is wrong, but for the specific use and meaning of the word, it is true. In fact, if you want to get really fancy and arguable, you'd say that no-one in the world is NT, because we all have some sort of problems we have deal with within ourselves, but I'll leave that to another thread to sort out. It's a confusing and debatable topic.
All in all, the short of it is this:
In the general use of the word, NT means anyone not on the spectrum.
In the specific use of the word, NT means anyone who is not, as the word suggests, Neurotypical.
For the totalist use of the word, the term NT it shouldn't even exist at all.
On WP, I can pick out that we use NT in it's general meaning, but we sometimes use it in the specific meaning too, but rarely in the totalist use of it.