Aug 9, 2025 antidisestablishmentarianism /ˌæntaɪdˌɪsəstˌæblɪʃməntˈɛɹiənˌɪzəm/ 12 syllables very rare noun.the doctrine or political position that opposes the withdrawal of state recognition of an established church; -- used especially concerning the Anglican Church in England. Opposed to disestablishmentarianism.