1. sabbatarian - Noun
2. sabbatarian - Adjective
One who regards and keeps the seventh day of the week as holy, agreeably to the letter of the fourth commandment in the Decalogue.
A strict observer of the Sabbath.
Of or pertaining to the Sabbath, or the tenets of Sabbatarians.
Source: Webster's dictionaryAlong with four others, they covenanted to meet together for worship, calling themselves Sabbatarian Baptists. Source: Internet
While first-day Sabbatarian practice declined during the 18th century, leaving few modern followers, its concern for stricter Sunday observances did have influence in the west, shaping the origin of the Christian Sabbath. Source: Internet
The name "Sabbatarian" has also been claimed by Christians, especially Protestants, who believe Sunday must be observed with just the sort of rigorous abstinence from work associated with " Shabbat ". Source: Internet