Wordnet 3.0
ADVERB (1)
1. 
 in an unjust or unfair manner; 
- Example: "the employee claimed that she was wrongfully dismissed"- Example: "people who were wrongfully imprisoned should be released"
The Collaborative International Dictionary of English v.0.48:
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.
   [1913 Webster]
WordNet (r) 3.0 (2006):
wrongfully
    adv 1: in an unjust or unfair manner; "the employee claimed that
           she was wrongfully dismissed"; "people who were
           wrongfully imprisoned should be released"