'Turn' in the Bible

And he gave the divisions of the priests their places for their work, as ordered by his father David, and to the Levites he gave their work of praise and waiting on the priests, to do what was needed day by day; and he gave the door-keepers their places in turn at every door; for so David, the man of God, had given orders.

Uzziah made towers in Jerusalem, at the doorway in the angle and at the doorway in the valley and at the turn of the wall, arming them.