A term applied to "an ordinance of a very irrevocable nature which a sovereign makes in affairs belonging wholly to himself, or what he reckons within his own right," but applied more particularly to the decree promulgated by Charles VI., emperor of Germany, whereby he vested the right of succession to the throne of Austria in his daughter, Maria Theresa, wife of Francis of Lorraine, a succession which was guaranteed by France, the States-General, and the most of the European Powers.