from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A red light or one of a pair mounted on the rear end of a vehicle. Also called tail lamp.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One of a pair of red lights, mounted on the rear of a vehicle, so it can be seen from the rear at night.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. lamp (usually red) mounted at the rear of a motor vehicle
tail + light (Wiktionary)