• high beam
• highbeam

high-beam (pluralhigh-beams)(usually in theplural)

1. The setting of an automobile'sheadlights adjusted to brighten a longer distance in front of the car, than when on the normal (low-beam) setting.

   Synonyms:full-beam,upper-beam,main beam,(plural)brights

   Antonyms:low-beam,dim light,dipped headlight,dimmed headlights

   Turn off yourhigh-beams - you're blinding the oncoming traffic.

2. (slang) Anerectnipple.