Christendom /ˈkrɪsn̩dəm/ noun Learner's definition of CHRISTENDOM
[noncount]
1
: people who are Christians基督教徒
2
: the part of the world where most people are Christians基督教世界;信奉基督教的国家 —
sometimes used in the old-fashioned phrase in all of Christendom有时用于旧式短语in all of Christendom