headlights is a form of:

Headlight



noun
1.
(FRENCH) (a light with a reflector and lens, on the front of an automobile, train, or other vehicle to illuminate the road ahead) ហ្វារអគ្គី, ភ្លើងហ្វារ
ENGLISH MEANING
noun
1.
A light, with a powerful reflector, placed at the head of a locomotive, or in front of it, to throw light on the track at night, or in going through a dark tunnel.