a river in northern Italy flowing east into the Adriatic. 15 miles (24 km) long: crossed by Julius Caesar when he marched against Rome in 49 b.c.
Sometimes rubicon . the act that commits someone to a particular course; point of no return: Publication serves as a Rubicon for authors, since they will be unable to edit their work afterward.
Idioms about Rubicon
cross / pass the Rubicon, to take a decisive, irrevocable step: Our entry into the war made us cross the Rubicon and abandon isolationism forever.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use Rubicon in a sentence
In most cases, this situation would foretell a Rubicon-crossing nightmare.Christian Wood Might Be The Rockets’ Silver Lining | Michael Pina | December 9, 2020 | FiveThirtyEight
Cruz said the companies “crossed the Rubicon” with their actions.Facebook, Google, Twitter CEOs clash with Congress in pre-election showdown | Tony Romm, Rachel Lerman, Cat Zakrzewski, Heather Kelly, Elizabeth Dwoskin | October 28, 2020 | Washington Post
My partner, a fellow Iraq veteran and volunteer with the disaster response nonprofit Team Rubicon, chuckled in agreement.
For the military veteran volunteers of Team Rubicon, it was a challenge to meet and an opportunity to serve again.
Team Rubicon, a disaster relief group led by veterans, earned its stripes volunteering during Sandy.
And I personally am set to read Rubicon this weekend, so I hope you'll do the same.
David has previously reviewed Holland's In the Shadow of the Sword, Persian Fire, and Rubicon.
It will be too late for us to go back then, Susan; the die will be cast, the Rubicon crossed, another poor man undone forever.Tessa Wadsworth's Discipline | Jennie M. Drinkwater
Warren quickly vanished among the trees and bowlders, and the Rubicon was crossed.The Young Ranchers | Edward S. Ellis
Meanwhile, Duplay walked home, the happier for having crossed his Rubicon.Tristram of Blent | Anthony Hope
They had crossed the Rubicon, and felt that there was no return.Historical Tales, Vol. 6 (of 15) | Charles Morris
Suppose I believe, for example, "that Caesar crossed the Rubicon."The Analysis of Mind | Bertrand Russell
British Dictionary definitions for Rubicon
a stream in N Italy: in ancient times the boundary between Italy and Cisalpine Gaul. By leading his army across it and marching on Rome in 49 bc, Julius Caesar broke the law that a general might not lead an army out of the province to which he was posted and so committed himself to civil war with the senatorial party
(sometimes not capital) a point of no return
a penalty in piquet by which the score of a player who fails to reach 100 points in six hands is added to his opponent's
cross the Rubicon or pass the Rubicon to commit oneself irrevocably to some course of action
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cultural definitions for Rubicon
A river in northern Italy that Julius Caesar crossed with his army, in violation of the orders of the leaders in Rome, who feared his power. A civil war followed, in which Caesar emerged as ruler of Rome. Caesar is supposed to have said, “The die is cast” (referring to a roll of dice), as he crossed the river.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Other Idioms and Phrases with Rubicon
see cross the rubicon.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.