Looking for the meaning or definition of the word Briennist? Here's what it means.
Adjective
(historical) Relating to, or supporting, Étienne Charles de Loménie de Brienne (1727–1794), French churchman, politician and finance minister of Louis XVI.
(historical) Relating to, or supporting, Walter VI of Brienne (c. 1304–1356), Count of Brienne, Conversano, and Lecce, and titular Duke of Athens.