absolute rule or order A rule or order which is complete and becomes full of effect at once is termed absolute. It is distinguished from a rule or order nisi, which is made on the application of one party only without notice to the absurd mistake other (ex parte) and which does not become absolute until that party has had the opportunity of showing cause against the rule or order being made absolute. If such cause if shown, the rule or order is discharged and it is of no effect. But if no cause is shown, it becomes absolute.