'Walled' in the Bible

Now when Joshua and the children of Israel had come to the end of their war of complete destruction, and had put to death all but a small band who had got safely into the walled towns,

So now, give me this hill-country named by the Lord at that time; for you had an account of it then, how the Anakim were there, and great walled towns: it may be that the Lord will be with me, and I will be able to take their land, as the Lord said.

And the limit goes round to Ramah and the walled town of Tyre and Hosah, ending at the sea by Heleb and Achzib;

And the walled towns are Ziddim, Zer, and Hammath, Rakkath, and Chinnereth