Definition of backup light in English:

backup light

noun

North american
  • A light at the rear of a vehicle that comes on when the vehicle is in reverse gear.

    • ‘I saw his backup lights but when he paused I thought he'd seen me.’
    • ‘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.’
    • ‘I was in the passenger's seat pounding against the glass while I saw his backup lights come right at me.’
    • ‘The white backup light will likely remain separate to keep cost and complexity in check.’
    • ‘He also likes the four factory-harnessed backup lights because they allow him to back up at off-road sites in the middle of the night.’
    • ‘He put it in reverse and our backup lights were almost as bright as our headlights and he started again, ‘It's going to see us leaving!’’
    • ‘Anyway I went to work on the right tail light as two of the brake lights were out and the backup light was out.’
    • ‘Two small grommet ‘marker’ lights in the bumper corner wraps also go on when the backup lights are on.’
    • ‘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.’
    • ‘Then backup lights shone like two eyes as the semi backed up to within twenty yards.’

Pronunciation:

backup light

/ˈbakˌəp ˌlīt/