The act of executing something. The state of being executed. The manner, style, or result of performance: The plan was sound; its execution, faulty. The act or an instance of putting to death or being put to death as a lawful penalty. Law The carrying into effect of a court judgment. Law A writ empowering an officer to enforce a judgment. Law Validation of a legal document by the performance of all necessary formalities. Archaic Effective, punitive, or destructive action.