- shabbatThe Jewish Sabbath, from sundown Friday to nightfall Saturday, commemorating God's rest on the seventh day in the book of Genesis.
- sabbatarianA person who regards and keeps the seventh day of the week ("Saturday", the Israelite or Jewish Sabbath) as holy in conformity with the fourth commandment of the Decalogue, such as an Orthodox Jew, Seventh-day Adventist, Seventh Day Baptist, a member of the Church of God (Seventh Day); a Sabbath-keeper, a Saturday-keeper.