EPIDEICTIC Meaning of EPIDEICTIC in English [ ˌɛpɪ'deɪktɪk , -'dʌɪktɪk ]■ adjective formal characterized by or designed to display rhetorical or oratorical skill.OriginC18: from Gk epideiktikos . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004