From the dictionary definition, the second part of Webster's definition is the part that Billy is saying we do not really have (and I have to agree, we do not)..

2: freedom of humans to make choices that are not determined by prior causes or by divine intervention
That's the sticky part, right there. Our "free will" is, often, affected by a prior cause (sin) and does get, at least, "some" ***istance, when God starts drawing us.

So, we cannot really say we have "free will" in the second version of Webster's definition.

We do have the ability to make choices...and I think we maintain the ability to choose God, when he draws us. And, I believe we can choose him even before regeneration, through His grace and attracting quality.