Dictionary

Rubicon

noun Ru·bi·con \ˈrü-bi-ˌkän\

Definition of RUBICON

:  a bounding or limiting line; especially :  one that when crossed commits a person irrevocably

Origin of RUBICON

Latin Rubicon-, Rubico, river of northern Italy forming part of the boundary between Cisalpine Gaul and Italy whose crossing by Julius Caesar in 49 b.c. was regarded by the Senate as an act of war
First Known Use: 1626

Rubicon

geographical name Ru·bi·con \ˈrü-bi-ˌkän\

Definition of RUBICON

river 15 miles (24 kilometers) N cen Italy flowing E into the Adriatic

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