JeanieBeans -
I think it's more than just the matter of the dictionary definition, because dictionary definitions (and secular meanings) change from year to year. Easy examples are the words: gay, mouse, phat (fat), dope, bitching, and even the "n" word. I remember as a child looking that up and it said "ignorant". That definition could have applied to anyone of any color. Today, the dictionary says, "a taboo term for a black person." Microsoft® Encarta® Reference Library 2005. © 1993-2004 Microsoft Corporation. All rights reserved.
The WBTS says an apostate is someone who tries to turn others away from their former beliefs. Since I don't make it a practice to actively pursue others and show them the error of their ways, I don't consider myself an apostate by their standards. But by dictionary standards, I am.