i dont know but it sounds cool

originally, opposition to the disestablishment of the Church of England, now opposition to the belief that there should no longer be an official church in a country

Etymology Said by Weekley to be first recorded in Gladstone's "Church and State", in reference to a scheme directed against the Church of England. From establishment in the sense of the ecclesiastical system established by law; the Church of England. * establish - to set up, put in place, or institute (originally from the Latin stāre, to stand) * dis- + establish - ending the established status of a body, in particular a church, given such status by law, such as the Church of England * disestablish + -ment - the separation of church and state (specifically in this context it is the political movement of the 1860s in Britain) * anti- + disestablishment - opposition to disestablishment * antidisestablishment + -arian - an advocate of opposition to disestablishment (alternatively, but less likely and quite similar in meaning, "opposed to disestablishmentarians", depending on what "anti-" is taken to belong to) * antidisestablishmentarian + -ism - the movement or ideology of advocates of opposition to disestablishment; the movement or ideology that opposes disestablishment (simply not wanting a separation of church and state) Noun Singular antidisestablishmentarianism Plural uncountable antidisestablishmentarianism (uncountable) 1. A political philosophy opposed to the separation of a religious group ("church") and a government ("state"), esp. the belief held by those in 19th century England opposed to separating the Anglican church from the civil government.