: a branch of mathematics or of symbolic logic that deals with the nature and relations of sets. â set theoretic adjective. See set theory defined for kids. ADVERTISEMENT.
Discrimination Lawsuit. A lawsuit is a civil action brought before a court of law in which a plaintiff, a party who claims to have received damages from a defendant's actions, seeks a legal or equitable remedy. The defendant is required to respond to the plaintiff's complaint.
In a class action, one person (or a small group of people) files a lawsuit on behalf of a larger group of people. The larger group â the group of people the lawsuit represents â is the class. When a lawsuit is filed, it will define the proposed class. Anyone who meets this definition will be known as a class member.