traffic light

noun

: a visual signal (such as a system of colored lights) for controlling traffic

Examples of traffic light in a Sentence

Take a left at the traffic light.
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.
Installation of the traffic lights will probably occur this fall. Jim Woods, Chicago Tribune, 11 Jan. 2026 When the traffic light turned red, the driver allegedly drove through the intersection, and continued onto the westbound ramp. Kendrick Calfee updated January 10, Kansas City Star, 10 Jan. 2026 Outside, even traffic lights weren’t working, Valeriya said. Daria Tarasova-Markina, CNN Money, 2 Jan. 2026 Its fleet got another update later in December after a massive power outage in San Francisco exposed weakness in its system’s ability to operate when traffic lights are down. Karoline Leonard, Austin American Statesman, 30 Dec. 2025 See All Example Sentences for traffic light

Word History

First Known Use

1912, in the meaning defined above

Time Traveler
The first known use of traffic light was in 1912

Browse Nearby Words

Cite this Entry

“Traffic light.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/traffic%20light. Accessed 19 Jan. 2026.

Kids Definition

traffic light

noun
: a visual signal (as a system of green, yellow, and red lights) for controlling traffic

More from Merriam-Webster on traffic light

Last Updated: - Updated example sentences
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