Emily Dickinson Lexicon

DI'ET, n. [D. ryksdag; G. reichstag; Sw. riksdag; Dan. rigsdag; empire's day, imperial diet. These words prove that diet is from dies, day. So in Scots law, diet of appearance.]

An assembly of the states or circles of the empire of Germany and of Poland; a convention of princes, electors, ecclesiastical dignitaries, and representatives of free cities, to deliberate on the affairs of the empire. There are also diets of states and cantons. – Encyc.