@Jas3.1 Good find. I would say that confirms that we should not be using 'cult' to exclude anyone from questions on our site, as it confirms it's a very ambiguous term, and can be applied to any subset of Christianity.
@Flimzy Since this site is all about Christianity, specifically, I think the section on what it means in regards to discussions about Christianity is most relevant, and so "cult" is self-explanatory as referring to Mormonism, JW, etc.
> Applied to Christianity, this definition would encompass any group of any size smaller than the whole who claimed to be "Christian" but were identified by more established or larger bodies as being divergent on enough core beliefs to actually make them a different religion