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1814, from French trappiste, Cistercian monk of reformed order established 1664 by abbot De Rancé of La Trappe in Normandy.
a branch of the Roman Catholic Cistercians, founded by the converted courtier Armand de Rance (1626-1700), who had governed the Cistercian abbey of La Trappe in France, which he transformed (1662) into a community practicing extreme austerity of diet, penitential exercises, and absolute silence. He became its regular abbot in 1664 and, for more than 30 years, kept the abbey under his forceful sway.