What does Ezekiel 47:18 mean?

On the east, the border goes from between Hauran and Damascus, then down between Gilead and Israel, following the Jordan River all the way to the eastern sea. That’s your eastern border. Ezekiel 47:18 - Modern Text Bible

(The eastern boundary is marked by well-known regions and the Jordan River, stretching down to the Dead Sea. It’s a clear, natural border.)