: a usually red warning light mounted at the rear of a vehicle

called also taillamp

Examples of taillight 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.
Hillsborough County Sheriff Chad Chronister released the July 29 bodycam footage showing deputies stopping a vehicle in Tampa because its taillights and tag lights were not working. Michael Sinkewicz, FOXNews.com, 6 Aug. 2026 This is accompanied by vertical matrix taillights with 708 red LED particles and headlights with 228 LED beads per group. New Atlas, 1 Aug. 2026 In back the clamshell tailgate seen on previous Q5 and Q7 models is now a thing of the past, but optional curved OLED taillights featuring three-dimensional effects and lightning signatures look neat. Joel Feder, The Drive, 29 July 2026 Check that headlights, taillights, and brake lights work, and use high beams when conditions allow. Chris Hardesty, AJC.com, 23 July 2026 See All Example Sentences for taillight

Word History

First Known Use

1844, in the meaning defined above

Time Traveler
The first known use of taillight was in 1844

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Cite this Entry

“Taillight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/taillight. Accessed 8 Aug. 2026.

Kids Definition

: a red warning light mounted at the rear of a vehicle

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