Today’s definition of Eschatology will be short since there really is not much that can be said outside of the definition itself. My Homiletics seminary professor always said “don’t be to geeky greeky.” His point of course was that the average church member really doesn’t care about the technical qualities of various Greek words and syntax. So I try not to be to boring at least beyond what is necessary.
Wouldn’t you know it though eschatology is not in Webster’s 1828 nor is it a biblical word, strictly speaking; however, like the Trinity or the rapture its principle is. So..
Princeton.edu states of eschatoloy:
Eschatology - The branch of theology that is concerned with such final things as death and Last Judgment; Heaven and Hell; the ultimate destiny of humankind.
Eschatology deals with three categories – The individual in regards to death and the afterlife, Redemption through the coming , course, and consummation of Christ’s kingdom i.e. the millennium. And the world in regard to Christ’s return, the resurrection, final judgment , and the eternal state whether heaven or the lake of fire.
So when your pastor goes all geeky greeky on you and drops the eschatology bomb just remember he is speaking on final judgment and the context will tell you which category he is in.