Christendom

1. n. The whole body of Christians.
2. n. The profession of faith in Christ by baptism; hence, the Christian religion, or the adoption of it.
3. n. The name received at baptism; or, more generally, any name or appelation.
4. n. That portion of the world in which Christianity prevails, or which is governed under Christian institutions, in distinction from heathen or Mohammedan lands.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.