postulator

[ pos-chuh-ley-ter ]
/ ˈpɒs tʃəˌleɪ tər /

noun Roman Catholic Church.

a priest who presents a plea for a beatification or the canonization of a beatus.Compare devil's advocate(def 2).

Origin of postulator

First recorded in 1860–65, postulator is from the Latin word postulātor claimant. See postulate, -tor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for postulator

postulator
/ (ˈpɒstjʊˌleɪtə) /

noun

RC Church a person, usually a priest, deputed to prepare and present a plea for the beatification or canonization of some deceased person
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012