headlight

English

Etymology

From head +‎ light.

Pronunciation

  • (General American) IPA(key): /ˈhɛdˌlaɪt/
  • Audio (Australia):(file)

Noun

headlight (plural headlights)

  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.
    • 1965, James Holledge, Flying Saucers Over Australia, Sydney: Horwitz Publications, page 28:
      The indefinite object was drawing away from us at a high speed and eventually disappeared into a veil of atmospherics, very much as a headlight disappearing into a fog.
    • 2026 January 8, Drew Reagan, “A driving source of light pollution: How car headlights are reshaping the nighttime environment”, in DarkSky International‎[1], archived from the original on 20 June 2026:
      Improving how headlights are designed and controlled does not have to mean choosing between environmental protection and public safety. Smarter lighting that reduces unnecessary brightness and glare can benefit wildlife, improve driver comfort, and support safer nighttime travel.
  2. (US, slang, vulgar, chiefly in the plural) A woman's breast.
    • 1993, Quantum Leap, season 5, episode 14, spoken by Al Calavicci (Dean Stockwell):
      Oh, well. She's got... great... casabas. […] Well, you know. Melons. […] Hoo-has? Honkers? Hooters? Headlights? Uh... tatas? Teeters? Tweeters? Tom-toms? Tetons? […] I'm trying to say it. Uh, meatballs. Mangoes. Cream pies. Cupcakes? Uh... bangers? Bouncers? Bulumbas? […] Bazongas? Breasts! I said it.
  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).

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