Definition of sabbatarian:

part of speech: noun

A rigid observer of the Sabbath; one who keeps the Sabbath on the seventh day.

part of speech: adjective

Pert. to the Sabbath.

Usage examples:

• They reached Hammond's in one and twenty days from Lonely Hut, three days they had been forced to camp because of a blizzard, and three because Louis Napoleon was rigidly Sabbatarian H. G. Wells in "Marriage".

• Sunday laws, Sabbatarian legislation, have, of course, very largely been abandoned, except when restored in the interest, or supposed interest, of labor. Frederic Jesup Stimson in "Popular Law-making".

• Amongst the refugees for religious liberty who found their billet at Newport were many Jews, between whom and the Sabbatarians the community of the Sabbath was a strong tie, and amongst the formulas of prayer in use even down to my own boyhood I remember a common petition for the restoration of Israel; and the Sabbatarian eye of prophecy looked forward to the day when, in the peace of the millennium, the Jews in Jerusalem should be the witnesses of the faith of the Seventh- Day Baptist Church in the keeping alive the observance of the Eden repose initiated by the Creator. William James Stillman in "The Autobiography of a Journalist, Volume I".