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

    The first-born; the eldest.

  • Black's Law Dictionary: 2nd Edition

    L. Lat. Spelled also œsnecius, enitius, œneas, eneyus. The eldest-born; the first-born; senior, as contrasted with the puis-ne, (younger.) Spelman.