cloudiness

from WordNet (r) 3.0 (2006)

cloudiness
    n 1: the state of the sky when it is covered by clouds [syn:
         {cloudiness}, {cloud cover}, {overcast}]
    2: gloomy semidarkness caused by cloud cover [syn: {cloudiness},
       {overcast}]
    3: the quality of being cloudy [syn: {cloudiness}, {murkiness},
       {muddiness}]

from The Collaborative International Dictionary of English v.0.48

Cloudiness \Cloud"i*ness\, n.
   The state of being cloudy.
   [1913 Webster]