'Christendom' definitions:

Definition of 'Christendom'

(from WordNet)
noun
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" [syn: Christendom, Christianity]

Definition of 'Christendom'

From: GCIDE
  • Christendom \Chris"ten*dom\, n. [AS. cristend[=o]m; cristen a Christian + -dom.]
  • 1. The profession of faith in Christ by baptism; hence, the Christian religion, or the adoption of it. [Obs.] --Shak. [1913 Webster]
  • 2. The name received at baptism; or, more generally, any name or appelation. [Obs.] [1913 Webster]
  • Pretty, fond, adoptious christendoms. --Shak. [1913 Webster]
  • 3. That portion of the world in which Christianity prevails, or which is governed under Christian institutions, in distinction from heathen or Mohammedan lands. [1913 Webster]
  • The Arian doctrine which then divided Christendom. --Milton [1913 Webster]
  • A wide and still widening Christendom. --Coleridge. [1913 Webster]
  • 4. The whole body of Christians. --Hooker. [1913 Webster]