That which is done, given, or effected outside the course of regular judicial proceedings. Not founded upon, or unconnected with, the action of a court of law, as in extrajudicial evidence or an extrajudicial oath.
That which, though done in the course of regular judicial proceedings, is unnecessary to such proceedings, or interpolated, or beyond their scope, as in an extrajudicial opinion.
An extrajudicial statement is an out-of-court utterance, either written or oral. When offered into court as evidence, it is subject to the hearsay rule and its exceptions.
An extrajudicial oath is one that is not taken during judicial proceedings but taken formally before a proper officer or magistrate, such as a notary public.