• WordNet 3.6
    • n Rubicon a line that when crossed permits of no return and typically results in irrevocable commitment
    • n Rubicon the boundary in ancient times between Italy and Gaul; Caesar's crossing it with his army in 49 BC was an act of war
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Webster's Revised Unabridged Dictionary
    • n Rubicon (Anc. geog) A small river which separated Italy from Cisalpine Gaul, the province alloted to Julius Cæsar.☞ By leading an army across this river, contrary to the prohibition of the civil government at Rome, Cæsar precipitated the civil war which resulted in the death of Pompey and the overthrow of the senate; hence, the phrase to pass or cross the Rubicon signifies to take the decisive step by which one is committed to a hazardous enterprise from which there is no retreat.
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Century Dictionary and Cyclopedia
    • Rubicon To lurch. (See lurch, transitive verb) In rubicon piquet, when the loser's score does not reach 100 it is added to the winner's. In rubicon bezique, see the extract.
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Chambers's Twentieth Century Dictionary
    • n Rubicon rōōb′i-kon a stream of Central Italy, forming the boundary in the republican period of ancient Roman history between the province of Gallia Cisalpina and Italia proper
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  • Max Muller
    Max Muller
    “Language is the Rubicon that divides man from beast.”


Crossing the Rubicon - When you are crossing the Rubicon, you are passing a point of no return. After you do this thing, there is no way of turning around. The only way left is forward.


In literature:

Pass this Act, and you will be past the Rubicon.
"The Loyalists of America and Their Times, Vol. 1 of 2" by Egerton Ryerson
The die has long since been cast, and the Rubicon crossed.
"Amos Huntingdon" by T.P. Wilson
The Rubicon once crossed, they fell to with a will.
"The Works of Guy de Maupassant, Vol. 1 (of 8)" by Guy de Maupassant
The Iberus was his Rubicon.
"Hannibal" by Jacob Abbott
He paused on the brink of the stream, and feared to cross the Rubicon.
"Seek and Find" by Oliver Optic
The Rubicon was crossed.
"The Rough Road" by William John Locke
The king had crossed the Rubicon.
"Little Folks (November 1884)" by Various
One felt that Beatrice had crossed the Rubicon.
"The Message" by Alec John Dawson
The Piltdown individual, on the other hand, has crossed the Rubicon.
"Progress and History" by Various
Know we what they call it which have forded the Rubicon, and stand safe on the pavement of the Golden City?
"In Convent Walls" by Emily Sarah Holt

In poetry:

But I leave you by where no man
Finds you, when I too be gone
From the puddles on this common
Over the dark Rubicon.
"To An Old Quill Of Lord Dunsany's" by Francis Ledwidge
Peace, peace! Let go the South for ever,
United States again? no—never!
The bond is loosed, the die is cast,
The Rubicon of Fate is passed!
"America--"Peace, Peace, O Peace!"" by Janet Hamilton
The Rubicon is passed. Pause not, go on
To conquest fresh, and newer fields of fame:
Ye brave Allies, may no dark influence mar
The united glories of your arms and name!
"Night Scene At The Fall of Sebastopol" by Janet Hamilton

In news:

AMC cancels ' Rubicon '.
Talking 'Mad Men,' 'The Office,' ' Rubicon ' and more.
AMC cancels political conspiracy series ' Rubicon '.
Rubicon – El Paso's Best Local Rock Profile.
We (dre d cruz, t-bird & jahneo) created rubicon in october of 2010.
Rubicon to Launch Analytical Kits that Use ZyGEM's DNA Extraction Products.
El Dorado Hills community mourns loss of Rubicon Trail crash victim.
Rubicon Trail crash victim, Rachel Gray, dies over weekend.'s Kelsey Mays takes a look at the 2010 Jeep Wrangler Unlimited Rubicon .
' Rubicon ' is no 'Mad Men'.
Jake Wood, Founder of Team Rubicon .
Jake Wood, Founder of Team Rubicon (Total Vols: 100).
The Kelley Institute for Social Impact and IU Office of Veteran Student Services are partnering to host Jake Wood, the co-founder and President of Team Rubicon at Indiana University.
' Rubicon ' will require plenty of patience.
Team Rubicon is an amazing group of US citizens that answered the call to duty immediately following the 12 January 2010 Haiti earthquake.