Definition of proselytation in US English:

proselytation

noun

rare
  • The action or process of seeking to convert someone from one opinion, religion, party, etc., to another; proselytizing.

Origin

Mid 19th century; earliest use found in George Faber (1773–1854), Church of England clergyman and religious writer. From proselyte + -ation.

Pronunciation

proselytation

/ˌprɒsɪlʌɪˈteɪʃn/