Nes·to·ri·us (n?-stôr??-?s) Died ad 451. Syrian-born patriarch of Constantinople whose belief that Mary was the mother only of Jesus’s human nature was declared heretical (431).American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Nestorius (n??st??r??s) n (Biography) died ?451 ad, Syrian churchman; patriarch of Constantinople (428?431); deposed for heresy by the Council of EphesusCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Nes?to?ri?us (n??st?r i ?s, -?sto?r-) n. died A.D. 451?, Syrian ecclesiastic: patriarch of Constantinople 428?431; condemned as a heretic. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.