From Longman Business Dictionary
lawsuitlaw·suit /ˈlɔːsuːt, -sjuːtˈlɒːsuːt/ noun [countableC]LAW a charge, claim, or complaint against someone that is made in a court of law by a private person or company, not by the police or statelawsuit againstLocal people filed a privatelawsuit against the City over water contamination.
After a three-year court battle, the family settled the lawsuit for a reported $250000.