(intransitive) To become cloudy or overcast.

polar stratospheric cloud

(astronomy) A roughly spherical region of space composed of comet-like bodies and other minor planets and asteroids that orbit distantly in a planetary system.

(meteorology) The percentage or fraction of the sky obscured by clouds.

plural of clouded leopard

simple past tense and past participle of cloud over

(meteorology) a standing cloud, extending downwind from a mountain range, or ridge.

(meteorology) A small cloud formation which is found attached to, or close by, a major cloud of one of the cloud genera, which is responsible for its development and continuance.

(meteorology) a small cloud that remains stationary and is related to a geographical feature, such as a mountain. Classified as banner clouds, cap clouds, crest clouds, or lenticular clouds http://amsglossary.allenpress.com

(meteorology) a small, triangular cloud, extending downwind from the peak of a mountain as if a flag, or banner.