traffic signal

noun

: a signal (such as a traffic light) for controlling traffic

Examples of traffic signal in a Sentence

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.
The public safety power shurtoffs have led Simi Valley to issue a traffic alert, warning the community of impacts to multiple traffic signals. — Julie Sharp, CBS News, 16 Oct. 2026 Those included hanging traffic signals, scaffolding, water towers and the correct power lines. — Davide Abbatescianni, Variety, 15 Oct. 2026 At the same time, a traffic signal at Hazel Avenue and Folsom Boulevard was flashing in all directions, disrupting train signals at three additional intersections, Selenis said. — Sacbee.com, 15 Oct. 2026 By synchronizing 12 traffic signals between Topanga Canyon Boulevard and John Tyler Drive, Caltrans can now adjust signals in real time. — Karen Garcia, Los Angeles Times, 9 Oct. 2026 See All Example Sentences for traffic signal

Word History

First Known Use

1893, in the meaning defined above

Time Traveler
The first known use of traffic signal was in 1893

Browse Nearby Words

Cite this Entry

“Traffic signal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/traffic%20signal. Accessed 20 Oct. 2026.

Kids Definition

traffic signal

noun
: a signal (as a traffic light) for controlling traffic

More from Merriam-Webster on traffic signal

Love words? Need even more definitions?

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