class action

noun [C] LAW

Definition

› a legal action that is organized by a group of people who all have the same legal problem: She is one of about 100 women whose claims of discrimination led the U.S. District Court to expand the California case to a nationwide class action.a class-action suit/lawsuit A class-action suit against the company describes its sales methods as "inherently abusive."

(Definition of class action noun from the Cambridge Business English Dictionary © Cambridge University Press)