a large light, usually one of two, at the front of a vehicle; the beam from this light （车辆的）前灯，头灯，前灯的光束
He dipped his headlights (= directed the light downwards) for the oncoming traffic.
考虑到迎面而来的车辆，他把自己的前灯调为近光。
~ sth (BrE) if you dip your headlights when driving a car at night, you make the light from them point down so that other drivers do not have the light in their eyes 把（汽车前灯的）远光调为近光