| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| Rubicon |
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| SYLLABICATION: | Ru·bi·con |
| PRONUNCIATION: |  r  b -k n |
| NOUN: | A limit that when passed or exceeded permits of no return and typically results in irrevocable commitment. | | ETYMOLOGY: | Latin Rubic , Rubicn-, 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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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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