red alert

noun

: the final stage of alert in which enemy attack appears imminent
broadly : a state of alert brought on by impending danger

Examples of red alert in a Sentence

The troops have been put on red alert. the paparazzi were on red alert for sightings of the hot new Hollywood couple
Recent Examples on the Web
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.
This isn’t the first time Martinelli’s attempts to leave Panama have been thwarted — previously, Nicaragua canceled his travel plans over fears of an Interpol red alert notice, which asks police agencies around the world to arrest someone on sight. Antonio Maria Delgado, Miami Herald, 4 Apr. 2025 City authorities issued two red alerts for road ice and blizzard dangers, while several districts canceled classes for Monday, the Global Times reported. Jessie Yeung, CNN, 2 Mar. 2025 But with the Cannes Film Market just around the corner, industry are suddenly on red alert and the impact is already being felt. Andreas Wiseman, Deadline, 5 May 2025 The app uses an algorithm that warns patients using yellow or red alerts. IEEE Spectrum, 6 Mar. 2021 See All Example Sentences for red alert

Word History

First Known Use

1941, in the meaning defined above

Time Traveler
The first known use of red alert was in 1941

Browse Nearby Words

Cite this Entry

“Red alert.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/red%20alert. Accessed 3 Jun. 2025.

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!