Source : Webster's Revised Unabridged Dictionary (1913)

Muddiness \Mud"di*ness\, n.
   1. The condition or quality of being muddy; turbidness;
      foulness caused by mud, dirt, or sediment; as, the
      muddiness of a stream.

   2. Obscurity or confusion, as in treatment of a subject;
      intellectual dullness.

Source : WordNet®

muddiness
     n : the quality of being cloudy [syn: {cloudiness}, {murkiness}]