Source : Webster's Revised Unabridged Dictionary (1913)

Wrongful \Wrong"ful\, a.
   Full of wrong; injurious; unjust; unfair; as, a wrongful
   taking of property; wrongful dealing. -- {Wrong"ful*ly}, adv.
   -- {Wrong"ful*ness}, n.

Source : WordNet®

wrongful
     adj 1: having no legally established claim; "the wrongful heir to
            the throne" [syn: {unlawful}]
     2: unlawfully violating the rights of others; "wrongful death";
        "a wrongful diversion of trust income"
     3: not just or fair; "a wrongful act"; "a wrongful charge"