The sinful state of a soul resulting from actual sin.
After the act of sin has been accomplished, the soul remains in a state of aversion from God.
This state, considered as destroying the due order of man to God, is habitual sin or guilt (reatus culpae); considered as depriving the soul of the beauty of grace, it is a stain (macula peccati).
This sinful state is imputable to the sinner because it follows from a voluntary sinful act.
It remains until satisfaction is made.
New Catholic Dictionary