protestantism Protestantishly • Protestantize · · · Info · Definitions · Characters · · protestantism · · Text Latin · · Script 13 · · Length Definitions · · · (noun) the theological system of any of the churches of western Christendom that separated from the Roman Catholic Church during the Reformation. Synonyms: Protestantism. · · Noun Definition 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074