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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Example Sentences
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Recent Examples of red lights
In the last three years, police have issued more than 180 e-bike citations and 230 warnings for violations that include running red lights, failing to stop at stop signs, riding on sidewalks and engaging in hazardous riding behaviors.
—
City News Service, San Diego Union-Tribune, 15 Sep. 2025
City surveillance cameras allegedly showed Macias failing to stop for multiple red lights and hitting a vehicle at Pershing Road and Main Street shortly before the fatal crash.
—Kansas City Star, 15 Sep. 2025
That interaction produces the green and red lights.
—Jamie Carter, Forbes.com, 2 Sep. 2025
The crossing arms are already down, red lights flashing in warning.
—Devoun Cetoute, Miami Herald, 23 Aug. 2025
The tower’s glimmering red lights mix with an orange-and-pink sunset in the background to create an image that feels both moody and instantly nostalgic.
—Ray Mark Rinaldi, Denver Post, 18 Aug. 2025
After seven red lights, two final blue flash near the 9,000 rpm mark—your cue to pull the upshift paddle.
—Jonny Lieberman, Robb Report, 16 Aug. 2025
Once the bus stops, red lights will flash and a stop sign will swing out.
—Sacbee.com, 11 Aug. 2025
For an entire week, the flashing blue and red lights of police vehicles cast eerie glows inside residents’ homes, while helicopters and drones hummed relentlessly overhead.
—Alaa Elassar, CNN Money, 10 Aug. 2025
City News Service, San Diego Union-Tribune, 15 Sep. 2025
City surveillance cameras allegedly showed Macias failing to stop for multiple red lights and hitting a vehicle at Pershing Road and Main Street shortly before the fatal crash.
—Kansas City Star, 15 Sep. 2025
That interaction produces the green and red lights.
—Jamie Carter, Forbes.com, 2 Sep. 2025
The crossing arms are already down, red lights flashing in warning.
—Devoun Cetoute, Miami Herald, 23 Aug. 2025
The tower’s glimmering red lights mix with an orange-and-pink sunset in the background to create an image that feels both moody and instantly nostalgic.
—Ray Mark Rinaldi, Denver Post, 18 Aug. 2025
After seven red lights, two final blue flash near the 9,000 rpm mark—your cue to pull the upshift paddle.
—Jonny Lieberman, Robb Report, 16 Aug. 2025
Once the bus stops, red lights will flash and a stop sign will swing out.
—Sacbee.com, 11 Aug. 2025
For an entire week, the flashing blue and red lights of police vehicles cast eerie glows inside residents’ homes, while helicopters and drones hummed relentlessly overhead.
—Alaa Elassar, CNN Money, 10 Aug. 2025
Recent Examples of Synonyms for red lights
Noun
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Many demand precise projections, treating volatile margins as red flags.—
Jacob Bennett,
Fortune,
18 Sep. 2025
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But by then, your financials may show slowing sales or shrinking margins—both red flags for lenders.—
Joe Camberato,
Forbes.com,
18 Sep. 2025
Noun
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In recent years, Grupo Firme, Fuerza Regida, and Peso Pluma have received similar warnings from different cartels, prompting them to cancel shows to protect themselves and their fans.—
Tomás Mier,
Rolling Stone,
13 Sep. 2025
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France’s cyber defense agency CERT-FR has confirmed the latest such warnings have just been issued.—
Zak Doffman,
Forbes.com,
13 Sep. 2025
Noun
-
Many of the protesters held anti-Trump signs and Palestinian flags.—
David Brennan,
ABC News,
18 Sep. 2025
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More than thirty signs referencing racial discrimination and the hostile attitudes of white people to those who were formerly enslaved will come down or be partially covered.—
News Desk,
Artforum,
18 Sep. 2025
Cite this Entry
“Red lights.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20lights. Accessed 19 Sep. 2025.
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