What does 'Crossing the Rubicon' mean?

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.
  • Category: Place name
  • Contributed By: Stephen Gann

All idioms have been editorially reviewed, and submitted idioms may have been edited for correctness and completeness.

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