'Deep' in the Bible

Go for help to him who makes Orion and the Pleiades, by whom the deep dark is turned into morning, who makes the day black with night; whose voice goes out to the waters of the sea, sending them out over the face of the earth: the Lord is his name;

This is what the Lord let me see: and I saw that the Lord God sent for a great fire to be the instrument of his punishment; and, after burning up the great deep, it was about to put an end to the Lord's heritage.

Even if they go deep into the underworld, my hand will take them up from there; if they go up to heaven, I will get them down: