Rubicon: Meaning and Definition of

Ru•bi•con

Pronunciation: (r'bi-kon"), [key]
— n.
  1. a river in N Italy flowing E into the Adriatic. 15 mi. (24 km) long: in crossing this ancient boundary between Cisalpine Gaul and Italy, to march against Pompey in 49b.c., Julius Caesar made a major military commitment.
  2. to take a decisive, irrevocable step: Our entry into the war made us cross the Rubicon and abandon isolationism forever.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
rubiaceous rubicund
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