Source : Webster's Revised Unabridged Dictionary (1913)

Unsociability \Un*so`cia*bil"i*ty\, n.
   The quality or state of being unsociable; unsociableness.

Source : WordNet®

unsociability
     n : an unsociable disposition; avoiding friendship or
         companionship [syn: {unsociableness}] [ant: {sociability}]