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

Relevance

Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for red light
  1. warning
  2. red flag
  3. sign
Noun
  • An extreme heat warning is currently in place for Death Valley, which is the lowest, hottest and driest portion of the North American continent and the United States’ largest national park outside of Alaska.
    — Lianne Kolirin, CNN Money, 25 Aug. 2026
  • An additional 45,000 people were in the adjacent evacuation warning zone.
    — John Raby, Fortune, 24 Aug. 2026
Definition of warning
Noun
  • Imagine handing in a dissertation and your advisor sees the little red flag.
    — Harmeet Kaur, CNN Money, 20 Aug. 2026
  • They're built to avoid obvious red flags and exploit disconnected verification processes.
    — Robert Granados, Forbes.com, 20 Aug. 2026
Definition of red flag
Noun
  • Private equity’s growing interest in sports teams is another sign of the buying boom, said Irwin Kirshner, the head of the sports law group at the law firm Herrick Feinstein.
    — Chris Isidore, CNN Money, 24 Aug. 2026
  • In hindsight, that was a sign of having lived in the bubble of NYC cinephile culture for 20 years by that time.
    — José Salazar, IndieWire, 24 Aug. 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
See all Nearby Words

Cite this Entry

“Red light.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20light. Accessed 26 Aug. 2026.

Copy Citation
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of devolve

See Definitions and Examples »

Popular in Grammar & Usage

See More

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

What's the difference between 'fascism' and 'socialism'?

Commonly Misspelled Words
See More

Popular in Wordplay

See More

Ye Olde Nincompoop: Old-Fashioned Words for 'Stupid'

14 Phobias You Probably Haven't Heard Of

Even More Words That Sound Like Insults But Aren't

16 Glee-ridden Words from Schitt's Creek

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

Ye Olde Nincompoop: Old-Fashioned Words for 'Stupid'

14 Phobias You Probably Haven't Heard Of
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
alt-684346df967d5
Add A Letter Quiz Pick the letter that goes in the same spot in fou...
See All