Hah, I'd expect "ordinary" and "normal" here to mean "ordinary / normal senses for a human", not for the hypothetical telepathy user. That wouldn't be a very useful usage of these words, so I doubt that's what was meant here. There is always a reference point for someone saying something is "normal" or "ordinary", and that reference point, for a human dictionary, would be a human with human senses.
When I say that a shark has an extraordinary set of teeth, I obviously mean from a human point of view, and not claiming that it's not normal from the shark's point of view. And when I, or a dictionary, say that telepathy doesn't use usual senses, similarly the meaning is that they would be unusual for a human, and personally I would find a species having a sense for radio waves, to be unusual.