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red line

red line

23 4.4
A limit in talks that must not be crossed to avoid serious problems
  • noun
  • /rɛd laɪn/
  • Literature
translation icon : línea roja
  • - Do not cross the red line.
  • cross the red line

Biden then redefined his red line as well.

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Examples

  • Democrats also indicate that there is a red line relating to taxation on the middle class.

    Blog text (23)
  • Everyone else in the region wishes the United States would set red lines for Israel.

    Blog text (27)
  • - You went over the red line.

  • The big question is whether red lines are firm or whether they simply indicate talking points.

    Blog text (23)
  • Will the United States accept Russia's red lines in order to keep the reset on track?

    Academic text (2010)
  • In Netanyahu's speech, he made it clear that Israel has a red line for the Iranian nuclear program.

    Blog text (21)
  • We should ensure that the red line for protecting farmland is not crossed and strictly control land uses.

    Blog text (13)
  • The U.S. involvement in the Khurd case demonstrates its desire to mark its red lines in East Jerusalem.

    Blog text (16)
  • Consider also the red lines that Lindsay and Takeyh say would be essential for a policy of containment to work.

    Academic text (2010)
  • In the negotiations, the ambassador stated that the use of military force would cross a critical red line.

Synonyms

bright line
vsred line
  • Jargon
5 6.3

A clear, simple rule or limit used to make decisions, often in law

focuses on limits that trigger breakdowns in talks rather than general distinctions
redline
vsred line
4 6.4

A limit that must not be crossed in talks or technical work

has identical meaning but written as two separate words
bright-line rule
vsred line
  • Jargon
1 7.8

A clear rule that tells people exactly what to do

is more about negotiation breakpoints and consequences than legal standards
danger line
vsred line
7.4

A marked or imaginary line that shows where it is dangerous to go

is used for negotiation limits that cause breakdown rather than physical danger

Antonyms

37 3.0

Ability to bend or change shape without breaking

How Strict

deal-breaker
  • Informal
3 4.8
red line
  • Literature
23 4.4
guideline
344 3.1
suggestion
759 1.4

Surface Forms

red line singular
red lines plural

Morphology

red + line

The components 'red' (a color associated with danger/stop) and 'line' (a boundary) combine to give a metaphorical sense of a limit that must not be crossed, so the meaning is partly inferable to learners who know both words. However, this is a conventionalized political/negotiation metaphor rather than a literal composition, so many B1 learners may not predict the specific pragmatic meaning without prior exposure.

Etymology

Red line comes from the image of drawing a bright red line to mark a clear 'limit' you must not cross. Because red means 'stop' or danger, a 'red line' now means a firm boundary in talks that could cause serious trouble if crossed.