Red line (phrase)

The red line, or "to cross the red line", is a phrase used worldwide to mean a figurative point of no return or line in the sand, or "the fastest, farthest, or highest point or degree considered safe."[1][2]

  1. ^ "Redline - Definition". Merriam-webster.com. 2012-08-31. Retrieved 2013-08-28.
  2. ^ Ben Zimmer (July 19, 2013). "The Long History of the Phrase 'Red Line'". Wall Street Journal. Archived from the original on 2015-01-20.