What does Illuminati means in the court of law?

The term 'Illuminati' means nothing in a court of law.

The Illuminati was a short lived group (1776-1785) of enlightened intellectuals whose goal was the overthrow of the oppressive monarchy controlled by the church in Rome. They were very unsuccessful in their endeavor because that monarch, Charles Theodore (Karl Theodor), Prince-Elector and Duke of Bavaria, successfully destroyed the organization and imprisoned their leadership.

The modern day Illuminati is fictional, the product of writers and bloggers' imaginations.