high beam

noun
an automobile headlight beam providing bright, long-range illumination of a darkened road and chiefly for use in driving in nonurban areas.
Also, highbeam.
Compare low beam.


Origin:
1935–40

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To high beam
Example sentences
Use your high beam whenever you are not following or meeting a car.
The light from the high beam headlights will reflect back and cause glare.
The actively water-cooled target provides high beam power handling capability
  with various target materials.
Also, use of the high beam in daylight increases the likelihood that you will
  be seen by oncoming drivers.
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