'Middle' in the Bible

And I saw a round cover of lead lifted up; and a woman was seated in the middle of the ephah.

And in that day his feet will be on the Mount of Olives, which is opposite Jerusalem on the east, and the Mount of Olives will be parted in the middle to the east and to the west, forming a very great valley; and half the mountain will be moved to the north and half of it to the south.