Dictionary.com
definitions
  • synonyms

fog1

[fog, fawg]
See more synonyms for fog on Thesaurus.com
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.
Show More
verb (used with object), fogged, fog·ging.
  1. to cover or envelop with or as if with fog: The steam in the room fogged his glasses.
  2. to confuse or obscure: The debate did little else but fog the issue.
  3. to bewilder or perplex: to fog the mind.
  4. Photography. to produce fog on (a negative or positive).
Show More
verb (used without object), fogged, fog·ging.
  1. to become enveloped or obscured with or as if with fog.
  2. Photography. (of a negative or positive) to become affected by fog.
Show More

Origin of fog1

1535–45; perhaps by back formation from foggy. See fog2
Related formsfog·less, adjectiveun·fogged, adjectiveun·fog·ging, adjective

Synonyms

See more synonyms for on Thesaurus.com
3. obfuscation. See cloud. 7. becloud, obfuscate, dim, blur, darken. 8. daze, befuddle, muddle, mystify.

Antonyms

3. clarity. 7. clarify. 10. clear.

fog2

[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.
Show More

Origin of fog2

1300–50; Middle English fogge, fog < Scandinavian; compare Norwegian fogg long grass on damp ground, foggy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

gloomsmokesmogvaporsteamcloudconfusionmistmurkeffluviumobscuritywispnebulamurkinesssmotherhazegreasemiasmafilmsoup

Examples from the Web for fog

Contemporary Examples

Historical Examples

  • The frolic with the child seemed to have blown away a fog from between them.

    The Spenders

    Harry Leon Wilson

  • Meantime a white film of fog spread down the bay from the northward.

    Malbone

    Thomas Wentworth Higginson

  • He had seen something like a heavy flash of lightning in the fog.

    The Secret Agent

    Joseph Conrad

  • Major Jelles looked meditatively at me, through his fog of smoke.

    In the Valley

    Harold Frederic

  • Then he asked me, still at the window, "What's that fog doing now?"

    Questionable Shapes

    William Dean Howells


British Dictionary definitions for fog

fog1

noun
  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
Show More
verb fogs, fogging or fogged
  1. to envelop or become enveloped with or as if with fog
  2. to confuse or become confusedto fog an issue
  3. photog to produce fog on (a negative, print, or transparency) or (of a negative, print, or transparency) to be affected by fog
Show More

Word Origin

C16: perhaps back formation from foggy damp, boggy, from fog ²

fog2

noun
    1. a second growth of grass after the first mowing
    2. grass left to grow long in winter
Show More

Word Origin

C14: probably of Scandinavian origin; compare Norwegian fogg rank grass
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for fog

n.1

"thick, obscuring mist," 1540s, probably from a Scandinavian source akin to Danish fog "spray, shower, snowdrift," Old Norse fok "snow flurry," fjuk "snow storm." Cf. also Old English fuht, Dutch vocht, German Feucht "moist." Figurative phrase in a fog "at a loss what to do" first recorded c.1600.

Show More

n.2

"long grass," c.1300, probably of Scandinavian origin, cf. Norwegian fogg "long grass in a moist hollow," Icelandic fuki "rotten sea grass." The connection to fog (n.1), via a notion of long grass growing in moist dells of northern Europe, is tempting but not proven. Watkins suggests derivation from PIE *pu- "to rot, decay."

Show More

v.

1590s, from fog (n.1). Related: Fogged; fogging.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

fog in Science

fog

[fôg]
  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.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with fog

fog

see in a fog.

Show More
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.