I. head‧lamp /ˈhedlæmp/ noun [countable usually plural]
a headlight

[TahlilGaran] Dictionary of Contemporary English ▲

II. head‧light /ˈhedlaɪt/ (also headlamp) noun [countable usually plural]

1. one of the large lights at the front of a vehicle, or the beam of light produced by this:
Suddenly, a figure appeared in my headlights.

2. like a rabbit/deer caught in headlights so frightened or confused that you do not know what to do

[TahlilGaran] Dictionary of Contemporary English ▲