ENCYCLICAL Meaning of ENCYCLICAL in English [ ɛn'sɪklɪk(ə)l , ɪn- , -'sʌɪk- ]■ noun a letter sent by the pope to all bishops of the Roman Catholic Church.OriginC17: via late L. from Gk enkuklios 'circular, general'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004