'Wall' in the Bible

My beloved is like a gazelle or {a young stag}. Look! {He is} standing behind our wall, gazing {through} the window, looking {through} the lattice.

If she [is] a wall, {we will adorn her with a turret of silver}; but if she [is] a door, we will barricade her with boards of cedar.

I [was] a wall, and my breasts [were] like the towers, {so [my betrothed] viewed me with great delight}.