'Thick' in the Bible

So Moses stretched out his hand toward the sky, and there was thick darkness in all the land of Egypt for three days.

The Lord said to Moses, “Behold, I will come to you in a thick cloud, so that the people may hear when I speak with you and may also believe in you forever.” Then Moses told the words of the people to the Lord.

So it came about on the third day, when it was morning, that there were thunder and lightning flashes and a thick cloud upon the mountain and a very loud trumpet sound, so that all the people who were in the camp trembled.

So the people stood at a distance, while Moses approached the thick cloud where God was.