I'm skeptical. If a speaker told you that, then you should look at the data again very carefully-- "at the edge of somewhere else" might be a good way of giving an example, but it may not completely cover the definition for that location. I'd guess it's really just "far away" or "some other place". Or "at least at the edge of somewhere else".
Regardless, if that really is the definition, then I don't see why there would be some specific word for it.