'Back' in the Bible

I saw in the right hand of Him who sat on the throne a book written inside and on the back, sealed up with seven seals.

After this I saw four angels standing at the four corners of the earth, holding back the four winds of the earth, so that no wind would blow on the earth or on the sea or on any tree.

Pay her back even as she has paid, and give back to her double according to her deeds; in the cup which she has mixed, mix twice as much for her.