'Cloud' in the Bible

who went before you in the way, to seek you out a place to pitch your tents in, in fire by night, to show you by what way ye should go, and in the cloud by day.

And ye came near and stood under the mountain; and the mountain burned with fire unto the heart of heaven, with darkness, cloud, and thick darkness.

These words Jehovah spake unto all your assembly in the mount out of the midst of the fire, of the cloud, and of the thick darkness, with a great voice: and he added no more. And he wrote them upon two tables of stone, and gave them unto me.

And Jehovah appeared in the Tent in a pillar of cloud: and the pillar of cloud stood over the door of the Tent.