'Thick' in the Bible

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

Then Moses reported all the words of the people back to the LORD. The LORD told Moses, "Look, I'm coming to you in a thick cloud, so that the people may listen when I speak with you and always believe you." Moses reported the words of the people to the LORD.

Then the people stood at a distance, and Moses approached the thick cloud where God was.