CINEREOUS Meaning of CINEREOUS in English [ sɪ'nɪərɪəs ]■ adjective ash-grey.OriginME: from L. cinereus 'similar to ashes' (from cinis , ciner- 'ashes') + -ous . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004