rubicon

Noun
  1. The boundary in ancient times between Italy and Gaul;
    Caesar's crossing it with his army in 49 BC was an act of war (synset 108662127)
    is an instance of: bound, boundary, bounds - the line or plane indicating the limit or extent of something
  2. A line that when crossed permits of no return and typically results in irrevocable commitment (synset 105757039)
    is a type of: contrast, demarcation, dividing line, line - a conceptual separation or distinction
    same as: point of no return

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