: 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
Using low-beam headlights, which also activate your taillights.
—
Ca Weather Bot, Sacbee.com, 9 Jan. 2026
Make your vehicle visible to others both ahead of you and behind you by using your low-beam headlights since this means your taillights will also be on.
—Nc Weather Bot, Charlotte Observer, 8 Jan. 2026
That work extended to the fins on the back, where taillights previously were merely decorative.
—Dewayne Bevil, The Orlando Sentinel, 8 Jan. 2026
Just put on the flashing taillights.
—Glae Thien, San Diego Union-Tribune, 8 Jan. 2026
See All Example Sentences for taillight
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Ca Weather Bot, Sacbee.com, 9 Jan. 2026
Make your vehicle visible to others both ahead of you and behind you by using your low-beam headlights since this means your taillights will also be on.
—Nc Weather Bot, Charlotte Observer, 8 Jan. 2026
That work extended to the fins on the back, where taillights previously were merely decorative.
—Dewayne Bevil, The Orlando Sentinel, 8 Jan. 2026
Just put on the flashing taillights.
—Glae Thien, San Diego Union-Tribune, 8 Jan. 2026
See All Example Sentences for taillight
Cite this Entry
“Taillight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/taillight. Accessed 9 Jan. 2026.
Copy CitationKids Definition
taillight
noun
tail·light
ˈtā(ə)l-ˌlīt 
: a red warning light mounted at the rear of a vehicle
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