Extraneous \Ex*tra"ne*ous\, a. [L. extraneus, from extra. See {Extra-}, {Strange}.] Not belonging to, or dependent upon, a thing; without or beyond a thing; not essential or intrinsic; foreign; as, to separate gold from extraneous matter. Nothing is admitted extraneous from the indictment. --Landor. -- {Ex*tra"ne*ous*ly}, adv.