'Shutting' in the Bible

Then Omri went up from Gibbethon, with all the army of Israel, and they made an attack on Tirzah, shutting in the town on every side.

Now Ben-hadad, king of Aram, got all his army together, and thirty-two kings with him, and horses and carriages of war; he went up and made war on Samaria, shutting it in.