Source : Webster's Revised Unabridged Dictionary (1913)

Availableness \A*vail"a*ble*ness\, n.
   1. Competent power; validity; efficacy; as, the availableness
      of a title. [Obs.]

   2. Quality of being available; capability of being used for
      the purpose intended. --Sir M. Hale.

Source : WordNet®

availableness
     n : the quality of being at hand when needed [syn: {handiness},
         {accessibility}, {availability}] [ant: {inaccessibility},
          {inaccessibility}]