Thanks for your question and the chance to clarify. In Question 24592, the questioner talked about philosophers "redefining free will" but never defined the term himself/herself. So I cited the definition of "free will" given at merriam-webster.com. I did so in order to indicate just how much neuroscientists would have to show before they could be said to have shown that we (routinely) lack free will as the dictionary defines "free will".
The merriam-webster.com definition treats free will as an ability. I'm not sure if that means treating free will as an abstract construction, but in any case if it's not a good definition then I suggest that you let them know. I myself see nothing wrong with their definition.