the religious faith developed among the ancient Jews and characterized by belief in one God and by a religious life in accordance with scriptures and rabbinic traditions
Judaism is a practical religion based on the belief that God has revealed through the written and oral law (the Torah) ways of obeying his commandments in every aspect of daily life. Within modern Judaism groups such as Reformed Judaism lay stress on carrying out the spirit of the commandments rather than their literal observance — Professor John Rogerson
the cultural, social, and religious beliefs and practices of the Jews
Judaist noun
[via late Latin from Greek ioudaismos, from Ioudaios: see Jew]