Note:  Do not rely on this information. It is very old.


Rubicon, The, a small river of Northern Italy, formerly considered as the boundary between Italy and Gaul. Julius Cresar by crossing this took the irrevocable step which resulted in making him the ruler of Rome. The phrase "crossing the Rubicon" has now become proverbial to denote the adopting of any decided measure which commits one to a course of action.