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

    To assume royal powers without right. See 4 Bl. Comm. 76.

  • Black's Law Dictionary: 2nd Edition

    To encroach; to exercise power without due authority. To attempt to exercise royal power. 4 Bl. Comm. 76. A knight who forcibly assaulted and detained one of the king's subjects till he paid him a sum of money was held to have committed treason, on the ground of accroachment. 1 Hale, P. C. 80.