back-up light

back-up light

n
(Automotive Engineering) US and Canadian a light on the rear of a motor vehicle to warn others that the vehicle is being reversed. Also called: reversing light
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014