opaqueness

from WordNet (r) 3.0 (2006)

opaqueness
    n 1: incomprehensibility resulting from obscurity of meaning
         [syn: {opacity}, {opaqueness}]
    2: the quality of being opaque to a degree; the degree to which
       something reduces the passage of light [syn: {opacity},
       {opaqueness}] [ant: {clarity}, {clearness}, {uncloudedness}]

from The Collaborative International Dictionary of English v.0.48

Opaqueness \O*paque"ness\, n.
   The state or quality of being impervious to light; opacity.
   --Dr. H. More.
   [1913 Webster]