A decree is a form of divorce order. Decree absolute is the final order of a divorce, ending the marriage and giving the right to remarry. Decree Nisi is the unavoidable step before decree absolute where the parties know that the marriage will be ended when a Decree Absolute application is made.
A Petitioner can apply for the Decree Nisi to be converted into a decree absolute after six weeks and one day have passed from the Decree Nisi. The Respondent can only ask the court to convert after a further three months have passed. There can be material advantages to delaying the final decree until the final financial outcome is in place.