disestablishmentarianism \dis`es*tab`lish*men*ta"ri*an*ism\, n. The doctrine or political position that advocates abrogating the establishment of a church as the official state religion.. [PJC] Prior to the Puritans, very few earlier believers contended for any form of disestablishmentarianism. --David. W. Hall (Savior or Servant? Putting Government in Its Place: The Covenant Foundation, 1996)