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Rubicon

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Rubicon/ˈruːbɪˌkɑːn/noun
Rubicon
/ˈruːbɪˌkɑːn/
noun
Learner's definition of RUBICON  

the Rubicon

: a limit or point that you reach when the results of your actions cannot be changed
◊ This word comes from the name of a stream that separated Gaul from Italy. In 49 B.C., Julius Caesar started a war by illegally marching his army across the Rubicon and into Italy.
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