AskDefine | Define haze

Dictionary Definition

haze

Noun

1 atmospheric moisture or dust or smoke that causes reduced visibility
2 confusion characterized by lack of clarity [syn: daze, fog]

Verb

1 become hazy, dull, or cloudy
2 harass by imposing humiliating or painful tasks, as in military institutions

User Contributed Dictionary

English

Pronunciation

  • hāz, /heɪz/, /heIz/
    Rhymes: -eɪz

Homophones

Noun

  1. Very fine solid particles (smoke, dust) or liquid droplets (moisture) suspended in the air, slightly limiting visibility.
    Our hopes, however, soon vanished; for before eight o'clock, the serenity of the sky was changed into a thick haze, accompanied with rain.
    A blue haze, half dust, half mist, touched the long valley with mystery.
  2. The degree of cloudiness or turbidity in a clear glass or plastic, measured in percent.
    Haze is listed as a percent value and, typically, is about 1% for meat film.
  3. brewing countable Any substance causing turbidity in beer or wine.
    Various clarifying and fining agents are used in winemaking to remove hazes.
  4. Mental confusion; the state of being in a haze.
    In my haze of alcohol, I thought for one crazy instant that he had plumbed my secret.

Translations

very fine particles suspended in the air
degree of cloudiness in a glass or plastic
substance causing turbidity in beer or wine
mental confusion

Verb

  1. To perform an unpleasant initiation ritual upon a usually non-consenting individual, especially freshmen to a closed community such as a college or military unit.

Translations

to perform an initiation ritual

Related terms

Extensive Definition

thumb|left|Los Angeles skyline, showing haze. Haze is traditionally an atmospheric phenomenon where dust, smoke and other dry particles obscure the clarity of the sky. The WMO manual of codes includes a classification of horizontal obscuration into categories of fog, ice fog, steam fog, mist, haze, smoke, volcanic ash, dust, sand and snow. Sources for haze particles include farming (ploughing in dry weather), traffic, industry, forest fires and peat field fire. Seen from afar (e.g. approaching airplane), haze appears brownish, while mist is bluish-grey. Whereas haze formation is a phenomenon of dry air, mist formation is a phenomenon of humid air. However, haze particles may act as condensation nuclei for later mist droplet formation.
Haze is also use to describe turbidity in clear glass or plastic as a percent value, or turbidity in beer or wine.

Air pollution

Haze often occurs when dust and smoke particles accumulate in relatively dry air. When weather conditions block the dispersal of smoke and other pollutants they concentrate and form a usually low-hanging shroud that impairs visibility and may become a respiratory health threat. Industrial pollution can result in dense haze, which is known as smog.
Since 1991 haze has been a particularly acute problem in Southeast Asia. In response the ASEAN countries agreed on a Regional Haze Action Plan (1997) and later signed the Agreement on Transboundary Haze Pollution (2002). Under the agreement the ASEAN secretariat hosts a co-ordination and support unit.

Obscuration

Haze causes issues in the area of terrestrial photography, where the penetration of large amounts of dense atmosphere may be necessary to image distant subjects. This results in the visual effect of a loss of contrast in the subject, due to the effect of light scattering through the haze particles. Unlike other atmospheric effects such as cloud and fog, haze is spectrally selective: shorter (blue) wavelengths are scattered more, and longer (red/infrared) wavelengths are scattered less. For this reason many super-telephoto lenses often incorporate yellow filters or coatings to enhance image contrast.
Infrared (IR) imaging may also be used to penetrate haze over long distances, with a combination of IR-pass optical filters (such as the Wratten 89B) and IR-sensitive detector.

Turbidity

With production of plastic films haze has technical significance as the percentage of light that is deflected more than 2.5° from the incoming light direction.

References

haze in German: Dunst (Atmosphäre)
haze in Spanish: Bruma
haze in Finnish: Auer
haze in French: Brume sèche
haze in Hebrew: אובך
haze in Japanese: 煙霧
haze in Malay (macrolanguage): Jerebu
haze in Dutch: Heiig
haze in Norwegian Nynorsk: Tørrdis
haze in Norwegian: Tørrdis
haze in Portuguese: Névoa seca
haze in Russian: Дымка
haze in Simple English: Haze
haze in Thai: ฟ้าหลัว

Synonyms, Antonyms and Related Words

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