Definition of Christianity (noun)
- a monotheistic system of beliefs and practices based on the Old Testament and the teachings of Jesus as embodied in the New Testament and emphasizing the role of Jesus as savior
- synonyms: Christian religion
- the collective body of Christians throughout the world and history (found predominantly in Europe and the Americas and Australia)
- "for a thousand years the Roman Catholic Church was the principal church of Christendom"
- synonyms: Christendom
Source: Princeton University Wordnet