ATROCIOUS Meaning of ATROCIOUS in English ■ adjective1》 horrifyingly wicked. 2》 extremely bad or unpleasant.Derivatives~ly adverb~ness noun OriginC17: from L. atrox , atroc- 'cruel' + -ious . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004