Sabbathaism|sæbəˈθeɪɪz(ə)m| [f.Sabbathai + -ism.] The doctrines of Sabbathai Zebi (Heb.Shabb⊇thai Ç⊇bī), a false Messiah born at Smyrna a.d. 1626. 1882–3Schaff's Encycl.Relig.Knowl. II. 1129 Two Polish rabbis, who travelled extensively to propagate Sabbathaism.