Class

Definition from Nolo’s Plain-English Law Dictionary

A group that shares common attributes. In legal terms, this might be a group of people with the same level of rights (such as heirs who are equally related to the deceased), or who've suffered from the same discrimination or other injury. Whether a person is part of a class is often crucial in determining who can sue on the person's behalf or collect a share of a class action judgment.

Definition provided by Nolo’s Plain-English Law Dictionary.