the definition contained at the bottom of the post from "fairchild" nicely illustrates the murkiness surrounding this word. the greek word "apostasia", a later form of the root word "apostasis" appears twice in the new testament, and denotes not a kind of person, nor an act of doing something, but rather a kind af condition, namely that of having been seperated from a thing (a belief, political party etc.), and of now standing, settled, away from it.
this word ought not neccessarily to be a pejorative term, but we might reflect that the word is often used as an slur - and always has been, unfortunately.
pepheuga