[ teyl-lahyt ]

  1. a light, usually red, at the rear of an automobile, train, etc.

Origin of taillight

First recorded in 1835–45; tail1 + light1
  • Also called tail lamp .

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use taillight in a sentence

  • But it was not my husband's car, and in a little while its red tail-light disappeared in the darkness ahead.

  • The gears changed with a grind; Barbara looked up to see a single red tail-light.

    Lady Lilith | Stephen McKenna
  • There was a car waiting; the last I saw was its winking tail-light dimming into the darkness.

    The Blind Spot | Austin Hall
  • Above and spots below gray; wings and tail light brown; bill large.

  • As he wrote it in his pocket book he watched the red of the tail light diminish and disappear.

    The Gray Mask | Wadsworth Camp

British Dictionary definitions for tail-light


  1. other names for rear light

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012