From Longman Dictionary of Contemporary Englishclass actionˌclass ˈaction noun [countable] American EnglishSCL a lawsuit arranged by a group of people for themselves and other people with the same problem —class-action adjective [only before noun] class-action lawsuits
Examples from the Corpus
class action• The lawsuit later became a class action, representing about 1,400 current and former black Texaco employees.• A class action can drive you crazy.• Sucharow, which represented some of the investors in the class action.• Their long-term destiny lies in united working class action and the rejection of other forms of understanding.From Longman Business Dictionaryclass actionˈclass ˌaction [countable]LAW when a group of people who have all suffered in the same way take a person or organization to court togetherclass action lawsuits brought on behalf of smokers against tobacco companies → action 