Source : Webster's Revised Unabridged Dictionary (1913)

Unjust \Un*just"\, a.
   1. Acting contrary to the standard of right; not animated or
      controlled by justice; false; dishonest; as, an unjust man
      or judge.

   2. Contrary to justice and right; prompted by a spirit of
      injustice; wrongful; as, an unjust sentence; an unjust
      demand; an unjust accusation. -- {Un*just"ly}, adv. --
      {Un*just"ness}, n.

Source : WordNet®

unjust
     adj 1: not fair; marked by injustice or partiality or deception;
            "used unfair methods"; "it was an unfair trial"; "took
            an unfair advantage" [syn: {unfair}] [ant: {fair}]
     2: violating principles of justice; "unjust punishment"; "an
        unjust judge"; "an unjust accusation" [ant: {just}]
     3: not equitable or fair; "the inequitable division of wealth";
        "inequitable taxation" [syn: {inequitable}] [ant: {equitable}]
     4: not righteous; "`unjust' is an archaic term for
        `unrighteous'"