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

    A Roman law rule that lapse of time will not cure what was invalid at the outset.

  • Black's Law Dictionary: 2nd Edition

    In Roman law. The rule which is commonly expressed in the maxim, Quod ab initio non valet tractu temporis non convalebit, meaning that what is at the beginning void by reason of some technical (or other) legal defect will not become Valid merely by length of time. The rule applied to the institution of hœredes, the bequest of legacies, and such like. The rule is not without its application also in English law; e. g., a married woman's will (being void when made) is not made valid merely because she lives to become a widow. Brown.