Lewis Short
postfactus, or separate, post fac-tus, a, um, Part., from the obsol. postfacio
* Made or done afterwards (post-class.): post facta furta (opp. ante facta),Gell. 17, 7, 3.—Absol.: ex postfacto,from what is done afterwards, afterwards, subsequently,Dig. 21, 1, 44 fin. (20, 1, 22).
Charlton T. Lewis, Charles Short, A Latin Dictionary