That is a tricky definition, as @pevaquark mentions. From a scientific point of view, if you say that evolution is guided then you need the data to back it or at least a methodology for detecting guidance. As it stands, there isn’t a signal of guidance in the scientific data.
It is also important to point out that the scientific conclusion is tentative and based on methodology. It isn’t an ontological or theological claim. The best science can do is say that there is no statistically significant signal for guidance. That is also the position that many atheists, myself included. I don’t make the ontological or absolute claim that there is no guidance in evolution. What I do say is that there isn’t any apparent evidence for guidance which prevents me from accepting the claim, at least for now.