In the formal legal world, a court case that is dismissed with prejudice means that it is dismissed permanently. A case dismissed with prejudice is over and done with, once and for all, and can't be brought back to court. A case dismissed without prejudice means the opposite. It's not dismissed forever.

Why would a case be dismissed with prejudice?

A case will be dismissed with prejudice if there is reason for the case not to be brought back to court; for example, if the judge deems the lawsuit frivolous or the the matter under consideration is resolved outside of court.

What does with prejudice mean legally?

1. In civil procedure, when a court dismisses a case “with prejudice,” it means that the court intends for that dismissal to be final in all courts, and that res judicata should bar that claim from being reasserted in another court.