: 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
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.
—
Ca Weather Bot, Sacbee.com, 24 Jan. 2026
Ensure your vehicle is visible to others by using low-beam headlights, which also activate your taillights.
—Bay Area Weather Report, Mercury News, 23 Jan. 2026
Equipment stops such as driving with a broken taillight soared by 71%.
—Nick Sullivan, Charlotte Observer, 22 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
See All Example Sentences for taillight
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Ca Weather Bot, Sacbee.com, 24 Jan. 2026
Ensure your vehicle is visible to others by using low-beam headlights, which also activate your taillights.
—Bay Area Weather Report, Mercury News, 23 Jan. 2026
Equipment stops such as driving with a broken taillight soared by 71%.
—Nick Sullivan, Charlotte Observer, 22 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
See All Example Sentences for taillight
Cite this Entry
“Taillight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/taillight. Accessed 26 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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