This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Outside of the authority of a court.

adj. Outside of the usual judicial proceedings.

adj. Carried out without legal authority.

adj. Out of or beyond the power authority of a court or judge; beyond jurisdiction; not valid as a part of a judicial proceeding; , are null and void.

Outside of judicial proceedings; out of the proper court, or the ordinary course or scope of legal procedure: as, extrajudicial declarations (those made out of court).

adj. beyond the usual course of legal proceedings; legally unwarranted

"In 2001, despite threats and grenade attacks, Guatemalan judges eventually convicted three people for the murder of Bishop Juan José Gerardi, who had just released a report on the state's and the military's complicity in extrajudicial killings."

illegal   

high-society    human-readable    one-paragraph    one-sentence    single-page