1. [Brit] A written statement of the grounds of complaint made to court of law asking for the grievance to be redressed
   "The lawyer submitted a plaint detailing the client's case"
    
2. [literary] A cry of sorrow and grief
   "The mother's plaint echoed through the empty house";
   - lament, lamentation, wail

Derived forms: plaints

Type of: allegation, complaint