Those days, the Third Age of Middle-earth, are now long past, and the shape of all lands has been changed; but the regions in which Hobbits then lived were doubtless the same as those in which they still linger: the North-West of the Old World, east of the Sea.
There are no more uses of "Old World" in the book.
Show samples from other sources
You got a problem with an Old World Umber patois?
Neal Shusterman -- Unwind
If we had been back in the old world, in the World Before, I would have called an ambulance despite the fact that he had attacked my mom.