'Dense' in the Bible

The Lord said to Moses, “I am going to come to you in a dense cloud, so that the people will hear when I speak with you and will always believe you.” Then Moses reported the people’s words to the Lord.

You came near and stood at the base of the mountain, a mountain blazing with fire into the heavens and enveloped in a dense, black cloud.

Evil generation,pay attention to the word of the Lord!Have I been a wilderness to Israelor a land of dense darkness?Why do My people claim,“We will go where we want;we will no longer come to You”?

They will cut down her forest—this is the Lord’s declaration—though it is dense,for they are more numerous than locusts;they cannot be counted.

a day of darkness and gloom,a day of clouds and dense overcast,like the dawn spreading over the mountains;a great and strong people appears,such as never existed in ages pastand never will againin all the generations to come.