You know Og, I don't have a definite definition, I believe it relates to soft determinism and something I touched upon while researching determinism. For me, free will and free choice were represented differently but not by much, free choice bringing moral responsibility into determinism.
Here's an article I read on it which could probably describe it better than me
http://www.geocities.com/Athens/Delphi/2517/Four2.html
I'm not sure if I've read it or not, Is it in this thread or another?