noun Roman Catholic Church.
a willfully committed, serious transgression against the law of God, depriving the soul of divine grace.
Content related to mortal sin
Words nearby mortal sin
Compare venial sin.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for mortal sin
Christianity a sin regarded as involving total loss of graceCompare venial sin
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