Erastianism Erastian • Erastianize · · · Info · Definitions · Characters · · Erastianism · · Text Latin · · Script 11 · · Length Definitions · · · (noun) the doctrine that the state is supreme over the church in ecclesiastical matters. Synonyms: Byzantinism, Caesaropapism. · · Noun Definition 1 Characters · · E latin capital letter e U+0045 a latin small letter a U+0061 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074