: (nee-see pree-us) adj. Latin for "unless very first," in some jurisdictions this means the initial test court which heard an incident as distinguished from a court of appeals, like in courtroom nisi-prius. "Court of original jurisdiction" is actually replaced for term nisi prius.
a Latin expression for an effort which was initially heard by a judge and jury that is distinct from an endeavor performed on appeal.
On the other hand, at nisi prius and on the criminal circuit, he was accused of frequently attempting unduly to influence juries in their estimate of the credibility of evidence.