What is "Revolutionary?"

Copernicus wrote a book called "De Revolutionbus Orbitum" (On the Revolutions of the Heavenly Spheres.) Contrary to the Aristotelean viewpoint of the time, Copernicus argued that the Earth and planets revolved around the Sun. It continued that if someone where to make such a bold suggestion or idea, that it was like "On the Revolutions." Or, more easily stated, it was "Revolutionary."