'Wall' in the Bible

“My beloved is like a gazelle or a young stag.Behold, he is standing behind our wall,He is looking through the windows,He is gazing through the lattice.

“If she is a wall (discreet, womanly),We will build on her a turret (dowry) of silver;But if she is a door (bold, flirtatious),We will enclose her with planks of cedar.”

(The Shulammite Bride)“I was a wall, and my breasts were like the towers.Then I became in the king’s eyesAs one [to be respected and allowed] to find peace.