Meaning of white out in English:

white out

phrasal verb

  • 1(of vision) become impaired by exposure to sudden bright light.

    ‘My head had started to spin again, and my vision almost whited out.’
    ‘He tried to raise his head, and his sight whited out entirely.’
    1. 1.1(of a person) lose colour vision as a prelude to losing consciousness.
      ‘I bolted for the door and whited out as I hit the street.’