The state of the sky when it is covered by clouds.

synonyms: cloud cover, overcast.

Dutch: bewolking, wolkendek, wolkenlaag
Polish: zachmurzenie

Gloomy semidarkness caused by cloud cover.

synonym: overcast.

The quality of being cloudy.

synonyms: muddiness, murkiness.

Roget 426a: turbidity, cloudiness, fog, haze, muddiness, haziness, obscurity.    nephelometer [instrument to measure turbidity].