headlights
n. countable A2 Elementary US //ˈhɛdˌɫaɪts// UK //hˈɛdlaɪts// head·lights
n. the two powerful lights on the front of a car or other vehicle. You turn them on to see the road when it is dark or foggy.
n. the powerful lamps mounted on the front of a vehicle to illuminate the road ahead. Usually plural in reference to the pair of lights.
He turned on his headlights as the sun went down.
The driver flashed his headlights to warn oncoming traffic about the fallen tree in the road.
Modern vehicles often feature adaptive headlights that automatically adjust their beam direction based on steering input to improve visibility around sharp corners.
Usage
Almost always used in the plural form when referring to the set of lights on a vehicle.