Here is the definition of will (noun)
1. the faculty of conscious and especially of deliberate action; the power of control the mind has over its own actions: the freedom of the will.
2. power of choosing one's own actions: to have a strong or a weak will.
3. the act or process of using or asserting one's choice; volition: My hands are obedient to my will.
4. wish or desire: to submit against one's will.
5. purpose or determination, often hearty or stubborn determination; willfulness: to have the will to succeed.
6. the wish or purpose as carried out, or to be carried out: to work one's will.
7. disposition, whether good or ill, toward another.
8. Law.
a. a legal declaration of a person's wishes as to the disposition of his or her property or estate after death, usually written and signed by the testator and attested by witnesses.
b. the document containing such a declaration.
http://dictionary.reference.com/browse/will
I think #3 is what is the main focus when talking about free will, or the lack-there-of.