a member of the order of the Cistercians of the Strict Observance: known esp. for its asceticism and vow of silence
adjective
designating or of this order
See Trappist in American Heritage Dictionary 4
(trăpˈĭst)
noun
A member of the main branch of Cistercian monks, characterized by austerity and a vow of silence, established in 1664 at La Trappe Monastery in northwest France.