'Cloud' in the Bible

who is going before you in the way to search out to you a place for your encamping, in fire by night, to shew you in the way in which ye go, and in a cloud by day.

and ye draw near and stand under the mountain, and the mountain is burning with fire unto the heart of the heavens -- darkness, cloud, yea, thick darkness:

These words hath Jehovah spoken unto all your assembly, in the mount out of the midst of the fire, of the cloud, and of the thick darkness -- a great voice; and He hath not added, and He writeth them on two tables of stone, and giveth them unto me.

and Jehovah is seen in the tent, in a pillar of a cloud; and the pillar of the cloud standeth at the opening of the tent.