'Wall' in the Bible

But the angel of the LORD stood in a path of the vineyards, a wall being on this side, and a wall on that side.

And when the ass saw the angel of the LORD, she thrust herself unto the wall, and crushed Balaam's foot against the wall: and he smote her again.

And the suburbs of the cities, which ye shall give unto the Levites, shall reach from the wall of the city and outward a thousand cubits round about.

You are to measure from outside the wall of the town on the east side 2,000 cubits, on the south side 2,000 cubits, on the west side 2,000 cubits, and on the north side 2,000 cubits, with the town placed at the center. This reserved area is to serve as grazing land for their towns.