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Noun: full beam
Usage: Brit (N. Amer: high beam)
  1. The beam of a car's headlights that provides distant illumination
    "He switched to full beam on the dark country road";
    - high beam [N. Amer]

Derived forms: full beams

Type of: beam, beam of light, irradiation, light beam, ray, ray of light, shaft, shaft of light