(US, historical) The position or office of a patroon; landownership (originally of a Dutch colony).
It was a protest against the patroonship system, which went back to the 1600s when the Dutch ruled New York, a system where […] ‘a few families, intricately intermarried, controlled the destinies of three hundred thousand people and ruled in almost kingly splendor near two million acres of land.’
(US, historical) An estate run by a patroon, or under a similar system.