'Deep' in the Bible

he reveals the deep and secret things; he knows what is in the darkness, and the light dwells with him.

Now as he was speaking with me, I fell into a deep sleep with my face toward the ground; but he touched me, and set me upright.

Yet heard I the voice of his words; and when I heard the voice of his words, then was I fallen into a deep sleep on my face, with my face toward the ground.