English term (edited): \"class-action (lawsuit) \"

class action n. a lawsuit filed by one or more people on behalf of themselves and a larger group of people "who are similarly situated." Examples might include: all women who have suffered from defective contraceptive devices or breast implants, all those overcharged by a public utility during a particular period, or all those who were underpaid by an employer in violation of the Fair Labor Standards Act. If a class action is successful, a period of time is given for those who can prove they fit the class to file claims to participate in the judgment amount. Class actions are difficult and expensive to file and follow through, but the results can be helpful to people who could not afford to carry a suit alone, force businesses that have caused broad damage or have a "public be damned" attitude to change their practices and/or pay for damages, and possibly result in high fees for the winning attorneys. Often attorneys do not collect a fee at the beginning of a class action suit but might charge a contingent fee (such as 1/3 of the final judgment) which, occasionally, can be millions of dollars.

http://legal-dictionary.thefreedictionary.com/Class action l...