1) Make fast, old style 2) Ratify by stamping 3) Ratify, old style 
• (v. t.) To impress with a seal; to mark as with a seal; hence, to ratify.
En·seal' (ĕn*sēl') transitive verb To impress with a seal; to mark as with a seal; hence, to ratify. [ Obsolete] « This deed I do enseal .» Piers Plowman.