christianity Meaning, Definition & Usage

  1. 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
    Christian religion.
  2. noun the collective body of Christians throughout the world and history (found predominantly in Europe and the Americas and Australia)
    Christendom.
    • for a thousand years the Roman Catholic Church was the principal church of Christendom

WordNet

Chris*tian"i*ty noun
Etymology
OE. cristiente, OF. cristienté, F. chrétienté, fr. L. christianitas.
Definitions
  1. The religion of Christians; the system of doctrines and precepts taught by Christ.
  2. Practical conformity of one's inward and outward life to the spirit of the Christian religion
  3. The body of Christian believers. Obs.
    To Walys fled the christianitee Of olde Britons. Chaucer.

Webster 1913