'Middle' in the Bible

So Gideon and the hundred men who were with him came to the outskirts of the camp at the beginning of the middle watch, when they had just set the watch; and they blew the trumpets and smashed the jars that were in their hands.

And Samson grasped the two middle pillars upon which the house rested, and he leaned his weight upon them, his right hand on the one and his left hand on the other.