Definition of christendom

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