rearbackuplamp
nounUK /ˌrɪəˈbækʌp læmp/
US /ˌrɪrˈbækʌp læmp/
A rear backup lamp is a small light on the back of a car that turns on when the car goes backward.
The rear backup lamp lit up the driveway as she reversed out of the garage.
RELATED WORDS
OTHER MEANINGS
2. A warning light that signals to people behind that the vehicle is moving in reverse.
Drivers behind saw the rear backup lamp glow and stopped walking.
3. The replaceable bulb or LED unit inside the rear backup light housing.
He bought a new rear backup lamp at the auto parts store.
4. A small auxiliary light mounted at the rear of a trailer or truck for reversing.
The trailer's rear backup lamp flickered because of a loose wire.