Christen :: Christen (v. t.) To use for the first time.
Christendom :: Christendom (n.) The profession of faith in Christ by baptism; hence, the Christian religion, or the adoption of it..
Christendom :: Christendom (n.) The name received at baptism; or, more generally, any name or appelation..
Christendom :: Christendom (n.) That portion of the world in which Christianity prevails, or which is governed under Christian institutions, in distinction from heathen or Mohammedan lands..
Christendom :: Christendom (n.) The whole body of Christians.