I don't think this definition is quite as worthless as you argue. Specifically, you've missed the meaning of "relational". By "embodied" the definition means the physical (brain and rest of body). By "relational" I believe the point is all the stuff that happens to/around/in concert with the physical body and brain. You cannot decouple the brain from the external experiences of the brain, and so the mind must be considered as the processor (the brain) as well as all of the data (stimuli/experiences) that is input and output from the processor.