Definition of "headlight" in English

noun

1. A bright light, with a lens and reflector, on the front of a motor vehicle (or originally a ship or train), designed to illuminate the road when driving at night; normally one of a pair.

2. (US, slang, vulgar, chiefly in the plural) A woman's breast.

3. (Canada, slang, vulgar, chiefly in the plural) A woman's erect nipples, partially masked by clothing.

4. (US, slang, chiefly in the plural) A jewel; especially a diamond.

5. (US, slang, chiefly in the plural) Lysergic acid diethylamide (LSD).