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red line

noun
1.
Ice Hockey. a line of the color red that is parallel to and equidistant from the goal lines and divides the rink in half.
2.
a limit, point, or boundary beyond which one may not go without incurring negative consequences:
The use of chemical weapons is a red line, which, if crossed, could trigger military action.
Origin
1960-1965
1960-65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for red line
  • But then he took his pen and drew a red line clear through it.
  • And yet it's a red line, so you're not even supposed to bring it up.
  • As he walks, the map adjusts to each new point of view, and a red line marks the sidewalk leading to his destination.
  • The output from the telescope appeared on four three-track pen recorders as a squiggly red line on moving chart paper.
  • The only difference now was a long, thin red line hatched with staples running down her torso.
  • Gravity from matter does the slowing while dark energy does the speeding, it creates a combined curve denoted by the red line.
  • As the red line moves around the circle, the length of the green line changes.
  • The red line is the data from calculating the launch speed only from the angle and the x-velocity.
  • And that horrible red line represents the current labor market.
  • The graph arranges job losses by state in descending order, so the red line is always moving down.
British Dictionary definitions for red line

red line

noun
1.
a point beyond which a person or group is not prepared to negotiate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Difficulty index for red line

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Word Value for red

4
4
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