A sign given in advance; a foreshadow; a premonition; omen.
An sign, signal, or indicator set in advance, as a control.
verb
(transitive) To sign in advance.
[…] before whatever judge or tribunal, even though such judge or tribunal may be exempt or privileged, or even though by an especial mission foresigned by our own hand, we ordain that such discussion or suit be buried in an eternal oblivion, […]