Wilfrid (?w?lfr?d) n (Biography) Saint. 634?709 ad, English churchman; bishop of York (?663??703). At the Synod of Whitby (664) he argued successfully that Celtic practices should be replaced by Roman ones in the English Church. Feast day: Oct 12Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014