Definition of rubicon
English to English noun - the boundary in ancient times between Italy and Gaul; Caesar's crossing it with his army in 49 BC was an act of war
source: WordNet 3.0 - a line that when crossed permits of no return and typically results in irrevocable commitment
source: WordNet 3.0 - A small river which separated Italy from Cisalpine Gaul, the province alloted to Julius Cæsar.
source: Webster 1913
Visual Synonyms 
Nearby Word
rubicon, rubican, rubiacin, refusion, robeson, roy orbison, revision, refashion, refossion, repugn, rap session, robaxin, repossession, ribosome, repose on, repugnant, repugnance, repugnancy, raiffeisen, ravishment
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