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[teyl-lahyt] /ˈteɪlˌlaɪt/
a light, usually red, at the rear of an automobile, train, etc.
Also called tail lamp.
Origin of taillight
First recorded in 1835-45; tail1 + light1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for taillight
Historical Examples
  • We gained the graveled footpath only to see the taillight of the car dwindling to the north!

  • He smoked in silence, keeping his eyes on the red glow of the taillight ahead of them.

    The Penal Cluster Ivar Jorgensen (AKA Randall Garrett)
  • Rand kept Cabot's taillight in sight until the broker swung into his drive and put his car in the garage.

    Murder in the Gunroom Henry Beam Piper

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