Once a court has granted an order that is final in effect (disposing of all relief claimed, being definitive of the parties' rights, and not open to alteration), the court becomes functus officio and lacks jurisdiction to subsequently vary, alter, or discharge that order, regardless of whether the order was labeled as interim or included a return date. The effect of an order, not its form or label, determines whether it is final. An order allowing a burial that was executed before a return date is final in effect because it disposes of the entire relief claimed and definitively determines the rights of the parties.