blas·phe·my (bl?s?f?-m?)n. pl. blas·phe·mies 1. a. Contemptuous or profane speech or action concerning God or a sacred entity.b. An instance of this.2. a. Irreverent or impious action or expression in regard to something considered inviolable or sacrosanct.b. An instance of this.[Middle English blasfemie, from Late Latin blasph?mia, from Greek blasph?mi?, from blasph?mein, to blaspheme; see blaspheme.]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.blasphemy (?blæsf?m?) n, pl -mies1. (Ecclesiastical Terms) blasphemous behaviour or language2. (Law) law Also called: blasphemous libel the crime committed if a person insults, offends, or vilifies the deity, Christ, or the Christian religionCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014blas?phe?my (?blæs f? mi) n., pl. -mies. 1. impious utterance or action concerning God or sacred things. 2. an act of cursing or reviling God. [1175?1225; Middle English