Today a nice blog post appeared that describes a fairly typical view of human agency and free will among physicists.
http://backreaction.blogspot.com/2016/01/free-will-is-dead-lets-bury-it.html
(If you're not familiar with Bell's Theorem then I would recommend not spending too much time on the last three paragraphs, as the 'free will' being referenced there refers to a particular condition of a Bell's Theorem experiment and has little to do with anyone's usual concept of free will.)
Now, whenever this topic comes up I usually end up having the same question: How do most people even define free will? Obviously, there's the classic dualist free will where the mind is free from physical constraints and can do whatever the hell it wants. But there's also many notions of free will that are claimed to be compatible with the mind as just another time-evolving physical system while still having some essence of 'free will'.
My question to the forum is: "What, to you, does free will mean?" I'm genuinely curious as to how other people end up thinking about this topic.