Simple English definitions for legal terms
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An order nisi is a court order that will become final unless the affected party shows the court, within a specified time, why it should be set aside. It is often used in matrimonial cases, such as divorce.
For example, in a divorce case, the court may issue an order nisi granting one spouse custody of the children. If the other spouse disagrees with the order, they must show the court why it should be changed within a certain time frame. If they do not, the order will become final.