👉 Arianizer is a Christian term that means "a person who has been converted to Christianity." It was first used by Martin Luther King Jr. in 1964, when he wrote a letter to Bishop James A. White of the Southern Baptist Convention. The term was later adopted and expanded upon by various Christian denominations, including the Church of Jesus Christ of Latter-day Saints (LDS Church), which uses it to refer to converts from other religions or beliefs.