Definitions from Black's Law Dictionary: 2nd Edition and Ballentine's Law Dictionary as are available for each term in each dictionary.
  • Ballentine's Law Dictionary

    After the act (has been committed).

  • Black's Law Dictionary: 2nd Edition

    After the fact; by an act or fact occurring after some previous act or fact, and relating thereto; by subsequent matter; the opposite of ab initio. Thus, a deed may be good ab initio, or, if invalid at its inception, may be confirmed hy matter ex post facto.