Mortal sin
SINFUL ACT WHICH CAN LEAD TO DAMNATION IF A PERSON DOES NOT REPENT OF THE SIN BEFORE DEATH
Mortal sins; Grave sin; Delictum gravius; Mortal Sins; Mortal Sin; Sin, Mortal; Grave matter
A mortal sin (), in Catholic theology, is a gravely sinful act which can lead to damnation if a person does not repent of the sin before death. A sin is considered to be "mortal" when its quality is such that it leads to a separation of that person from God's saving grace.