Source : Webster's Revised Unabridged Dictionary (1913)

Alterity \Al*ter"i*ty\, n. [F. alt['e]rit['e].]
   The state or quality of being other; a being otherwise. [R.]

         For outness is but the feeling of otherness (alterity)
         rendered intuitive, or alterity visually represented.
                                                  --Coleridge.