noun Roman Catholic Church.
a transgression against the law of God that does not deprive the soul of divine grace either because it is a minor offense or because it was committed without full understanding of its seriousness or without full consent of the will.
Compare mortal sin.
Origin of venial sin
Middle English word dating back to 1350–1400
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for venial sin
Christianity a sin regarded as involving only a partial loss of graceCompare mortal 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