red light

noun

Definition of red lightnext
as in warning
something that tells of approaching danger or risk the reporter took her glower as a red light and stopped asking questions

Synonyms & Similar Words

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Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for red light
  1. warning
  2. red flag
  3. sign
Noun
  • The Archuleta County Sheriff's office in Colorado warned residents to shelter in place Friday morning, and by the evening had issued an evacuation warning.
    — Ava Berger, NPR, 24 Oct. 2026
  • Conventional early-warning aircraft have space for substantial radar arrays and powerful onboard systems, but their size and cost can limit how many can be deployed.
    — Bojan Stojkovski, Interesting Engineering, 24 Oct. 2026
Definition of warning
Noun
  • As last week’s red flag warning took effect, the reservoir remained out of service after a series of setbacks during repairs.
    — Noah Haggerty, Los Angeles Times, 22 Oct. 2026
  • The poor decision-making, surprisingly shaky accuracy, inability to elevate a weak supporting cast and difficulty moving through progressions quickly are all serious red flags.
    — Barry Jackson, Miami Herald, 21 Oct. 2026
Definition of red flag
Noun
  • Every year after Halloween, Spirit Halloween’s stores empty out and the signs come down.
    — Catherina Gioino, Fortune, 24 Oct. 2026
  • One particularly promising example is an MRI technique that identifies the central vein sign, a feature that can help physicians distinguish lesions associated with MS from abnormalities caused by other conditions.
    — Bruce Bebo, STAT, 24 Oct. 2026
Definition of sign
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Browse Nearby Words

redivisions
red light
red lights
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Cite this Entry

“Red light.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20light. Accessed 25 Oct. 2026.

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