Definitions from Wiktionary (mortal sin)

▸ noun:  (Roman Catholicism, theology) A sin which causes the loss of God's grace, leading to eternal damnation, unless the sinner repents, which includes their intent to confess and atone; such a sin is defined as a grave transgression against one of the Ten Commandments with the full knowledge and deliberate consent of the sinner.
▸ Also see mortal_sin


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