Justification

A sufficient or acceptable excuse or explanation made in court for an act that is otherwise unlawful; the showing of an adequate reason, in court, why a defendant committed the offense for which he or she is accused that would serve to relieve the defendant of liability.

A legal excuse for the performance or nonperformance of a particular act that is the basis for exemption from guilt. A classic example is the excuse of SELF-DEFENSE offered as justification for the commission of a murder.