EXTRANEOUS Meaning of EXTRANEOUS in English [ ɪk'streɪnɪəs , ɛk- ]■ adjective1》 irrelevant or unrelated to the subject. 2》 of external origin.Derivatives~ly adverb~ness noun OriginC17: from L. extraneus + -ous . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004