ESTABLISHMENTARIAN Meaning of ESTABLISHMENTARIAN in English [ ɪˌstablɪʃm(ə)n'tɛ:rɪən ]■ adjective advocating or relating to the principle of an established Church. ■ noun a person advocating this.Derivatives~ism noun Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004