fog

1 [fog, fawg] noun, verb, fogged, fog·ging.
noun
1.
a cloudlike mass or layer of minute water droplets or ice crystals near the surface of the earth, appreciably reducing visibility. Compare ice fog, mist, smog.
2.
any darkened state of the atmosphere, or the diffused substance that causes it.
3.
a state of mental confusion or unawareness; daze; stupor: The survivors were in a fog for days after the catastrophe.
4.
Photography. a hazy effect on a developed negative or positive, caused by light other than that forming the image, by improper handling during development, or by the use of excessively old film.
5.
Physical Chemistry. a mixture consisting of liquid particles dispersed in a gaseous medium.
verb (used with object)
6.
to cover or envelop with or as if with fog: The steam in the room fogged his glasses.
7.
to confuse or obscure: The debate did little else but fog the issue.
8.
to bewilder or perplex: to fog the mind.
9.
Photography. to produce fog on (a negative or positive).
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professional actors collectively, especially star performers
in which the main action is superimposed on or combined with simulated or separately filmed background action to produce special visual effects
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verb (used without object)
10.
to become enveloped or obscured with or as if with fog.
11.
Photography. (of a negative or positive) to become affected by fog.
Origin:
1535–45; perhaps by back formation from foggy. See fog2

Related forms
fog·less, adjective
un·fogged, adjective
un·fog·ging, adjective

Synonyms
3. obfuscation. See cloud. 7. becloud, obfuscate, dim, blur, darken. 8. daze, befuddle, muddle, mystify.

Antonyms
3. clarity. 7. clarify. 10. clear.
Dictionary.com Unabridged

fog

2 [fog, fawg]
noun U.S. and British Dialect.
1.
a second growth of grass, as after mowing.
2.
long grass left standing in fields during the winter.
Origin:
1300–50; Middle English fogge, fog < Scandinavian; compare Norwegian fogg long grass on damp ground, foggy

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
fog1 (fɒɡ) [Click for IPA pronunciation guide]
 
—n
1.  a mass of droplets of condensed water vapour suspended in the air, often greatly reducing visibility, corresponding to a cloud but at a lower level
2.  a cloud of any substance in the atmosphere reducing visibility
3.  a state of mental uncertainty or obscurity
4.  photog a blurred or discoloured area on a developed negative, print, or transparency caused by the action of extraneous light, incorrect development, etc
5.  a colloid or suspension consisting of liquid particles dispersed in a gas
 
—vb , fogs, fogging, fogged
6.  to envelop or become enveloped with or as if with fog
7.  to confuse or become confused: to fog an issue
8.  photog to produce fog on (a negative, print, or transparency) or (of a negative, print, or transparency) to be affected by fog
 
[C16: perhaps back formation from foggy damp, boggy, from fog²]

fog2 (fɒɡ) [Click for IPA pronunciation guide]
 
—n
a.  a second growth of grass after the first mowing
 b.  grass left to grow long in winter
 
[C14: probably of Scandinavian origin; compare Norwegian fogg rank grass]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

fog
1540s, from Dan. fog "spray, shower, snowdrift," related to O.N. fok "snow flurry." The word meaning "long grass" (c.1300) may be a different word, but the two may connect via a notion of long grass growing in moist dells of northern Europe. Phrase in a fog "at a loss what to do" first recorded c.1600.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
fog   (fôg)  Pronunciation Key 

  1. A dense layer of cloud lying close to the surface of the ground or water and reducing visibility to less than 1 km (0.62 mi). Fog occurs when the air temperature becomes identical, or nearly identical, to the dew point.

  2. An opaque or semiopaque condensation of a substance floating in a region or forming on a surface.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Abbreviations & Acronyms
FOG

  1. fiber optic gyro

  2. father of the groom

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage
Idioms & Phrases

fog

see in a fog.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
But all those embedded journalists have created a fog of information that can
  obscure the whole.
When there is fog and low visibility, the winds tend to be calm or negligible.
She is staring out into the fog astern with an expression of awed wonder.
The answers have spent the past year lost in the fog.
Idioms & Phrases
in a fog
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Images for fog
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