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
  • Some news stations would run a warning for viewers before the ad would air, as well as explain the FCC law requiring its airing.
    — Jeff Wagner, CBS News, 11 Aug. 2026
  • Amazon's Accounting Sets A Shorter Clock Amazon's books offer a warning.
    — Robert J. Szczerba, Forbes.com, 11 Aug. 2026
Definition of warning
Noun
  • Wildfire risk As winds ramped up across the islands, there were no red flag warnings in place, but Almanza said the dry and breezy conditions still would elevate fire concerns.
    — Jennifer Sinco Kelleher, Los Angeles Times, 15 Aug. 2026
  • But there is no indication in state paperwork that the problems found at Heights Crematory or other red flags triggered aggressive regular inspections of the Morgans’ businesses, or their ongoing operating practices.
    — Gregory Royal Pratt, Chicago Tribune, 15 Aug. 2026
Definition of red flag
Noun
  • There are signs that domestic hardware is beginning to take a larger role.
    — Neetika Walter, Interesting Engineering, 11 Aug. 2026
  • The remnants of the Boston Market restaurant sign are still visible … but not for long.
    — Linda Zavoral, Mercury News, 11 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 16 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 zeugma

See Definitions and Examples »

Popular in Grammar & Usage

See More

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

7 Pairs of Commonly Confused Words

Is that lie 'bald-faced' or 'bold-faced'?

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

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

Popular in Wordplay

See More

Words from the 'Odyssey'

The Longest Long Words List

It's a Scorcher! Words for the Summer Heat

The Words of the Week - Aug. 14

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

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

Words from the 'Odyssey'

The Longest Long Words List
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
image of a green cube out of place in a lineup of red spheres
Odd Word Out: Synonyms Vol. 2 Quiz Figure out which word isn't like the others.
See All