Definition

1. Noun:

   • A severe weather condition: A whiteout is an arctic or polar atmospheric phenomenon where falling or blowing snow, combined with a uniformly white sky (due to cloud cover), eliminates all shadows and contrasts. This creates a disorienting, uniform whiteness where the horizon disappears, and it becomes impossible to distinguish the ground from the sky, making navigation extremely hazardous.

2. Verb:

   • To lose visibility: To white out means for daylight visibility to be completely lost or severely reduced due to heavy fog, snow, or rain, creating conditions similar to the noun form.
   • To correct by covering: To white out (often hyphenated as white-out) means to cover a mistake, typically on paper, using a white, opaque correction fluid so that new text can be written over it.

Usage Examples

• Noun:

  • The pilot couldn't land due to a sudden whiteout over the airfield.
  • Hikers are warned about the dangers of whiteouts in the mountains during winter storms.

• Verb (visibility):

  • The storm intensified, and the landscape completely whited out.
  • Driving is not advised; the blizzard is causing roads to white out.

• Verb (correction):

  • Please white-out the spelling error in the second paragraph before we photocopy the report.
  • I had to white out several lines in the old document.

Advanced Usage

• "whiteout conditions": This phrase describes the environment during a whiteout event.
  • The expedition halted its progress due to whiteout conditions.

Variants and Related Words

• White-out (noun/verb): A common alternate spelling, especially for the correction fluid meaning. "Liquid paper" is a brand name for a type of white-out.
• Blizzard: A severe snowstorm with strong winds, which can cause a whiteout but is not synonymous with it.
• Zero Visibility: A general term for conditions where nothing can be seen, which is the result of a whiteout.

Synonyms

• Noun (weather): Ground blizzard, zero-visibility storm.
• Verb (correct): Correct, erase, obliterate.

Related Phrasal Verbs/Compounds

• White out (phrasal verb): Functions as the verb form for both losing visibility and applying correction fluid.
  • The windscreen whited out in an instant. (visibility)
  • Remember to white out the confidential details. (correction)

Related Idioms

• None directly associated. The term is used literally for the meteorological event or the corrective action.

Noun

1. an arctic atmospheric condition with clouds over snow produce a uniform whiteness and objects are difficult to see; occurs when the light reflected off the snow equals the light coming through the clouds

Verb

1. lose daylight visibility in heavy fog, snow, or rain
2. cover up with a liquid correction fluid
   • white-out the typo