A person whose mother was a Jew or who has converted to Judaism. According to the Reform movement, a person whose father is a Jew is also a Jew. Although the term is derived from the term "Judahite" (meaning a member of the tribe of Judah or a citizen of the kingdom of Judah), it has historically been applied to the patriarchs, the matriarchs and all of the descendants of Jacob and all converts to their faith. See Who Is a Jew?