as in red flags
something that tells of approaching danger or risk
the reporter took her glower as a red light and stopped asking questions
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Recent Examples of red lights
Federal regulators also have opened yet another investigation into Tesla’s self-driving feature after dozens of incidents in which the cars ran red lights or drove on the wrong side of the road, sometimes crashing into other vehicles and causing injuries.
—
Sasha Rogelberg, Fortune, 2 Nov. 2025
If the emergency vehicle behind you has solid blue and red lights shining, the officer inside is patrolling the area and just wants to be visible.
—Miami Herald Archives, Miami Herald, 30 Oct. 2025
For example, orange lights mark the warm-up segment to activate body’s core, red lights are used for the toning and strength sections, while blue ones define the more relaxing cool-down and stretching bits.
—Sandra Salibian, Footwear News, 28 Oct. 2025
Police clocked the teen driving at speeds over 100 mph without headlights and running red lights.
—Julie Mendes, AZCentral.com, 20 Oct. 2025
This probe covers dozens of dangerous driving incidents, including blowing through red lights, driving in the wrong lane of traffic, and three accidents that resulted in five injuries.
—Chris Isidore, CNN Money, 13 Oct. 2025
And though the visuals start calmly enough, with an old man puttering through a deserted city, the flashing blue, green, and red lights inject a jolt of madness that’s pushed into the surreal as the man confronts giant statue heads of the Weeknd and Moroder floating above the city.
—Jon Blistein, Rolling Stone, 10 Oct. 2025
In the first scenario, FSD-enabled cars have run red lights or come to a stop and then continued before the light turns green.
—PC Magazine, 10 Oct. 2025
Under the dim red lights, the audience and the band became one, swimming in a sea of sound.
—Ivan Kashinsky, NPR, 8 Oct. 2025
Sasha Rogelberg, Fortune, 2 Nov. 2025
If the emergency vehicle behind you has solid blue and red lights shining, the officer inside is patrolling the area and just wants to be visible.
—Miami Herald Archives, Miami Herald, 30 Oct. 2025
For example, orange lights mark the warm-up segment to activate body’s core, red lights are used for the toning and strength sections, while blue ones define the more relaxing cool-down and stretching bits.
—Sandra Salibian, Footwear News, 28 Oct. 2025
Police clocked the teen driving at speeds over 100 mph without headlights and running red lights.
—Julie Mendes, AZCentral.com, 20 Oct. 2025
This probe covers dozens of dangerous driving incidents, including blowing through red lights, driving in the wrong lane of traffic, and three accidents that resulted in five injuries.
—Chris Isidore, CNN Money, 13 Oct. 2025
And though the visuals start calmly enough, with an old man puttering through a deserted city, the flashing blue, green, and red lights inject a jolt of madness that’s pushed into the surreal as the man confronts giant statue heads of the Weeknd and Moroder floating above the city.
—Jon Blistein, Rolling Stone, 10 Oct. 2025
In the first scenario, FSD-enabled cars have run red lights or come to a stop and then continued before the light turns green.
—PC Magazine, 10 Oct. 2025
Under the dim red lights, the audience and the band became one, swimming in a sea of sound.
—Ivan Kashinsky, NPR, 8 Oct. 2025
Recent Examples of Synonyms for red lights
Noun
-
Analysts are increasingly highlighting potential red flags hanging over the AI investment cycle, especially the web of deals that some say gives the appearance that funds are simply being passed back and forth between the same companies.—
Steve Kopack,
NBC news,
6 Nov. 2025
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Former Assistant Principal Ebony Parker is accused of ignoring red flags that might have averted the 2023 shooting.—
Chris Boyette,
CNN Money,
3 Nov. 2025
Noun
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The footage, however, does not clearly show what preceded the alleged incident or whether any warnings were given.—
Martha McHardy,
MSNBC Newsweek,
25 Oct. 2025
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China conducted military exercises in Serbia in July despite stern warnings from the European Union, and Belgrade provides Beijing with a security foothold in Europe.—
Chris Massaro,
FOXNews.com,
25 Oct. 2025
Noun
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Trade discussions dominated those meetings, but there were signs of growing tensions over Beijing’s surging conventional and nuclear arsenal.—
Tamara Qiblawi,
CNN Money,
7 Nov. 2025
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Thanks to their thoughtful preservation efforts, signs of the past remain.—
Mel Studach,
Architectural Digest,
6 Nov. 2025
Cite this Entry
“Red lights.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20lights. Accessed 8 Nov. 2025.
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