Definition of Extrajudicial
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 e.g. 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 an extrajudicial opinion (dictum).
That which does not belong to the judge or his jurisdiction, notwithstanding fact that he takes cognizance of it.
That's the definition of Extrajudicial in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.