'Fortified' in the Bible

So David told Abishai, "Now Bichri's son Sheba is about to do more damage than did Absalom. So take my personal guards and go after them. Otherwise, he'll run to one of the fortified cities and escape from us."

This is what he said: LORD, you are my stone stronghold and my fortified place; you are continuously delivering me.

and arrived at the fortified city of Tyre and all of the towns of the Hivites and Canaanites.