Definition of backup light in English:

backup light

Syllabification: back·up light

noun

North American
A light at the rear of a vehicle that comes on when the vehicle is in reverse gear.
More example sentences
  • The stacked taillamps are vertical in orientation; there is a clear acrylic and polycarbonate lens covering three individual lamps: the top is a clear backup light; the middle is an amber turn signal; the bottom is the red stop lamp.
  • The white backup light will likely remain separate to keep cost and complexity in check.
  • It was extremely dark and if it wasn't for the little light coming from the backup light it would be unbearable to see anything.

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