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Rubicon

(ro̵̅o̅′bi kän′)

small river in N Italy that formed the boundary between Cisalpine Gaul & the Roman Republic: when Caesar crossed it (49 ) at the head of his army to march on Rome, he began the civil war with Pompey

Origin: L Rubico (gen. Rubiconis)

See Rubicon in American Heritage Dictionary 4

noun

A limit that when passed or exceeded permits of no return and typically results in irrevocable commitment.

Origin:

Origin: Latin Rubicō, Rubicōn-, Rubicon, a short river of north-central Italy, the crossing of which by Julius Caesar and his army in 49 B.C. began a civil war

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