taillight
nounEtymology From tail + light.
1
One of a pair of red lights mounted on the rear of a vehicle, so it can be seen from the rear at night.
- All moved to the front street, where Grierson snibbed on his tail-light and turned to ask the trooper, "They've got the main road ploughed up farther on, haven't they?"1938, Norman Lindsay, Age of Consent, 1st Australian edition, Sydney, N.S.W.: Ure Smith, published 1962, →OCLC, page 162: