The definition of a lawsuit is a legal act of suing between private parties, or a case in a civil court.
An example of a lawsuit is a person suing a company for damages done to the person which were not fixed.
a suit between private parties at law or in equity; case before a civil court
An action or proceeding other than a criminal prosecution brought in a court of law or equity.
lawsuit - Legal Definition
A litigation or action brought in a court. See also suit.