a defense of some offensive behavior or some failure to keep a promise etc.; "he kept finding excuses to stay"; "every day he had a new alibi for not getting a job"; "his transparent self-justification was unacceptable"
In jurisprudence, an excuse or justification is a form of immunity which must be distinguished from an exculpation. In this context, "to excuse" means to grant or obtain an exemption for a group of persons sharing a common characteristic from a potential liability. "To justify" as in justifiable homicide means to "vindicate" or show the justice in the particular conduct.
1. A made-up reason for doing or saying something. Sometimes for not doing or saying something. 2. An alcoholic will make up an excuse for his or her behavior, so that someone else is to blame. The responsibility is "not mine"! 3. A pretext we use to explain our actions, or lack of action. It is common that this reason target someone or something other than us.