Source : Webster's Revised Unabridged Dictionary (1913)

Impartial \Im*par"tial\, a. [Pref. im- not + partial: cf. F.
   impartial.]
   Not partial; not favoring one more than another; treating all
   alike; unprejudiced; unbiased; disinterested; equitable;
   fair; just. --Shak.

         Jove is impartial, and to both the same. --Dryden.

         A comprehensive and impartial view.      --Macaulay.

Source : WordNet®

impartial
     adj 1: showing lack of favoritism; "the cold neutrality of an
            impartial judge" [syn: {fair}] [ant: {partial}]
     2: free from undue bias or preconceived opinions; "an
        unprejudiced appraisal of the pros and cons"; "the
        impartial eye of a scientist" [syn: {unprejudiced}] [ant:
        {prejudiced}]