Proprietor: An owner or ruler who holds full authority over a property or territory. As the proprietor of Pennsylvania, William Penn had substantial control over its governance.
Frame of Government: The constitution created by William Penn for governing Pennsylvania. It emphasized representative democracy, separation of powers, and protection of individual rights.
Holy Experiment: A term used to describe William Penn's vision for establishing an ideal society based on Quaker principles in Pennsylvania. It aimed at testing whether such a society could thrive peacefully amidst diversity.