What Defines a Ceiling

1a : the overhead inside lining of a room The room has a high ceiling. b : material used to ceil a wall or roof of a room. 2 : something thought of as an overhanging shelter or a lofty canopy a ceiling of stars.

What's considered a ceiling?

The height above the Earth’s surface of the lowest layer of clouds or obscuring phenomena that is reported as broken, overcast, or obscuration, and not classified as thin or partial.

Is Fog considered a ceiling?

After all, both conditions are technically identical: ceiling is a cloud, while reduced visibility is often caused by fog, which is simply a cloud on the ground. … When the ceiling drops below 3000 feet, the visibility often diminishes. Likewise when fog sets in, a low ceiling often follows.