the Rubicon
noun/ðə ˈruːbɪkən/
/ðə ˈruːbɪkɑːn/
[singular]- the point at which a decision has been taken which can no longer be changed
- Today we cross the Rubicon. There is no going back.
Word OriginFrom the Rubicon, a stream which formed the border between Italy and Gaul. When Julius Caesar broke the law by crossing it with his army in 49BC, it led inevitably to war.
Check pronunciation:
the Rubicon