My definition of "apcalypse"

I have been thinking about what Mr. Bevill said this morning in class about defining apocalypse.  The first definition of "apocalypse" from Merriam-Webster is "one of the Jewish and Christian writings of 200 b.c. to a.d. 150 marked by pseudonymity, symbolic imagery, and the expectation of an imminent cosmic cataclysm in which God destroys the ruling powers of evil and raises the righteous to life in a messianic kingdom."  I do not think this definition is fitting for this class or assignment, so I am going to mix this with the more common meaning that almost everyone mentioned in their presentations- "the end of this world."  My basic definition of the "apocalypse" for this assignment and class is "the events that bring about the end of this world as we know it that God uses to destroy the evil authorities and take His children to His kingdom that He has prepared" (Erika Blalock and the Merriam-Webster dictionary).  This definition will shape my paper and affect how I look at the War between the Arab countries and Israel.  Did anyone else mix and match definitions to create their own?
So, I am really wrestling with this concept of defining my argument now. I do not really understand what I am supposed to do about that in this stage of research. Does anyone know exactly what to do and how to do it? Is our thesis just supposed to be if we think that our topic could be apocalyptic and how our event would affect the world?