What is Perturbation?

Legal Definition
This is a technical word which signifies disturbance, or infringement of a right. It is usually applied to the disturbance of pews, or seats in a church. In the ecclesiastical courts actions for these disturbances are technically called "suits for perturbation of seat." 1 Phillim. 323. Vide Pew.
-- Bouviers Law Dictionary
Legal Definition
In the English ecclesiastical courts, a "suit for perturbation of seat" is the technical name for an action growing out of a disturbance or infringement of one's right to a pew or seat in a church. 2 Phillim. Eco. Law, 1813.
-- Black's Law Dictionary
Legal Definition
-- Ballentine's Law Dictionary