Noun

1. (roman catholic church) a church father known for his constant fight against perceived heresies; a saint and doctor of the church (329-391)
2. Italian pope from 1831 to 1846; conservative in politics and theology; worked to propagate catholicism in england and the united states (1765-1846)
3. The pope who sponsored the introduction of the modern calendar (1572-1585)
4. The italian pope from 1406 to 1415 who worked to end the great schism and who retired to make it possible (1327-1417)
5. The italian pope who fought to establish the supremacy of the pope over the roman catholic church and the supremacy of the church over the state (1020-1085)
6. (roman catholic church) an italian pope distinguished for his spiritual and temporal leadership; a saint and doctor of the church (540?-604)