DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   plaint
       n 1: (United Kingdom) a written statement of the grounds of
            complaint made to court of law asking for the grievance to
            be redressed
       2: a cry of sorrow and grief; "their pitiful laments could be
          heard throughout the ward" [syn: lament, lamentation,
          plaint, wail]