RED LIGHT Synonyms: 28 Similar and Opposite Words

red light

noun

Definition of red light

as in warning

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

Recent Examples of Synonyms for red light

Noun

Understanding the gravity of a red flag warning and adhering to these precautions is paramount in averting wildfires during these perilous conditions.

— CA Weather Bot, Sacbee.com, 14 July 2026
An evacuation warning means a potential threat to life and/or property, and those who require time to evacuate were urged to leave ahead of any mandatory evacuation order.

— Carlos E. Castañeda, CBS News, 14 July 2026

Definition of warning

Noun

Understanding the gravity of a red flag warning and adhering to these precautions is pivotal in reducing the risk of wildfires during these hazardous conditions.

— CA Weather Bot, Sacbee.com, 12 July 2026
Your doctor will also ask you about potential red flags that something more serious may be going on, such as red or black stool or unintentional weight loss.

— Sarah Klein, Time, 10 July 2026

Definition of red flag

Noun

This is the first sign of the kind of tomfoolery Luke has in store for the night.

— Rafaela Bassili, Vulture, 14 July 2026
The bright blue sign reading ‘Alligator Alcatraz’ outside the silver chain-link gate at Dade-Collier Training and Transition Airport has been removed.

— Alex Harris, Miami Herald, 13 July 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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“Red light.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20light. Accessed 17 Jul. 2026.

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Synonyms of red light

noun

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