The Collaborative International Dictionary of English v.0.48:

Impartiality \Im*par`ti*al"i*ty\, n. [Cf. F. impartialit['e].]
   The quality of being impartial; freedom from bias or
   favoritism; disinterestedness; equitableness; fairness; as,
   impartiality of judgment, of treatment, etc.
   [1913 Webster]

         Impartiality strips the mind of prejudice and passion.
                                                  --South.
   [1913 Webster]

WordNet (r) 3.0 (2006):

impartiality
    n 1: an inclination to weigh both views or opinions equally
         [syn: impartiality, nonpartisanship] [ant:
         partiality, partisanship]