'Wall' in the Bible

Then the angel of the Lord stood in a path among the vineyards, where there was a wall on either side.

And when the donkey saw the angel of the Lord, she pressed herself into the wall, and crushed Balaam's foot against the wall. So he beat her again.

The grazing lands around the towns that you will give to the Levites must extend to a distance of 500 yards from the town wall.

"You must measure from outside the wall of the town on the east 1,000 yards, and on the south side 1,000 yards, and on the west side 1,000 yards, and on the north side 1,000 yards, with the town in the middle. This territory must belong to them as grazing land for the towns.