Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Extrajudicial \Ex`tra*ju*di"cial\, a. Out of or beyond the power authority of a court or judge; beyond jurisdiction; not valid as a part of a judicial proceeding; as, extrajudicial oaths, judgments, etc., are null and void. -- Ex`tra*ju*di"cial*ly, adv.
Douglas Harper's Etymology Dictionary
Wiktionary
a. 1 (cx legal English) Out of or beyond the power or authority of a court or judge; beyond jurisdiction. 2 (context legal of a punishment English) carry out without legal authority.
WordNet
adj. beyond the usual course of legal proceedings; legally unwarranted; "an extrajudicial penalty"
Usage examples of "extrajudicial".
It was the extrajudicial activities of Justices Fortas and Douglas that had caused them trouble.
The extrajudicial opinion of the judges in the case of ship money had been procured by his intrigues, persuasions, and even menaces.
If you can answer that question in the affirmative, then do so explicitly, by demonstrating how their opinions in this case can be reconciled with their opinions in prior cases as well as with their extrajudicial writings.
Some of its inmates were sentenced to Darkside after a formal trial, others were condemned to Darkside via extrajudicial actions.
He sounded like he might be proposing something extrajudicial, a sign of the times.