Source : Webster's Revised Unabridged Dictionary (1913)

Fogginess \Fog"gi*ness\, n.
   The state of being foggy. --Johnson.

Source : WordNet®

fogginess
     n 1: an atmosphere in which visibility is reduced because of a
          cloud of some substance [syn: {fog}, {murk}, {murkiness}]
     2: the quality of being indistinct [syn: {indistinctness}, {blurriness},
         {fuzziness}] [ant: {distinctness}]