oecumenism oecumenicity • oecus · · · Info · Definitions · Synonyms · Characters · · oecumenism · · Text Latin · · Script 10 · · Length 6 · · Syllables Definitions · · · (noun) a movement promoting union between religions (especially between Christian churches). Synonyms: ecumenism. · · Noun Definition 1 Synonyms · · · ecumenism · · Synonym 1 Characters · · c latin small letter c U+0063 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 s latin small letter s U+0073 u latin small letter u U+0075