— Sabbatarianism , n.
/sab'euh tair"ee euhn/ , n.
1. a person who observes the seventh day of the week, Saturday, as the Sabbath.
2. a person who adheres to or favors a strict observance of Sunday.
adj.
3. of or pertaining to the Sabbath and its observance.
[ 1605-15; sabbatari ( us ) ( sabbat ( um ) SABBATH + -arius -ARY) + -AN ]