Definition

1. Verb:
   • To lose daylight visibility in heavy fog, snow, or rain: This verb describes the meteorological phenomenon where visibility during the day is severely reduced or eliminated due to intense precipitation (like snow or rain) or dense fog, creating a uniform white or gray appearance in the atmosphere that obscures the horizon and landmarks.

Usage

• The verb "white-out" is used to describe a specific, severe weather condition. It is typically used in an impersonal or passive construction, often describing what happens to visibility or to a place.
• Common Constructions: "Visibility whitened out," "The area whitened out," "We were whitened out by the blizzard."

Examples

• Verb:
  • The pilot decided not to land as the runway whitened out in the sudden snow squall.
  • Hikers are warned that the summit can white-out rapidly, making navigation impossible.
  • During the storm, the entire landscape whitened out, and we couldn't see the barn from the house.

Advanced Usage

• Impersonal/Environmental Subject: The subject is often the visibility, the weather, or the location itself.
  • The mountain pass frequently whites-out in winter.
• Causative Sense: The weather agent (blizzard, fog) can be implied as causing the white-out condition.
  • The intense lake-effect snow whitened out the city for hours.

Variants and Related Words

• Whiteout (noun): The condition or event itself. This is the more common form.
  • The drivers were stranded by a sudden whiteout on the highway.
• White-out (noun, alternate spelling): Same as "whiteout."
• Zero-visibility: A technical term describing a similar condition.

Synonyms

• Become obscured: (General)
• Be blotted out: (Idiomatic, for visibility)
• Be shrouded: (Often used with fog or mist)

Notes on Meaning

• Specific Meteorological Term: "White-out" as a verb is a specialized term derived from the noun. Its primary meaning is tied to the loss of visual reference points due to uniform, bright conditions, typically involving snow, but also applicable to heavy fog or rain.
• Distinction from "White Out" (correction fluid): This is a completely separate meaning. The correction fluid is a compound noun ("white-out" or "Wite-Out" as a trademark). The verb related to weather is not connected to the act of using correction fluid.

Verb

1. lose daylight visibility in heavy fog, snow, or rain