'Middle' in the Bible

So Gideon, and the hundred men that were with him, came unto the outside of the camp in the beginning of the middle watch; and they had but newly set the watch: and they blew the trumpets, and brake the pitchers that were in their hands.

And Gaal spake again and said, See there come people down by the middle of the land, and another company come along by the plain of Meonenim.

And Samson took hold of the two middle pillars upon which the house stood, and on which it was borne up, of the one with his right hand, and of the other with his left.