Fog definition

fôg, fŏg
A similar mass of smoke, dust, etc. obscuring the atmosphere.
noun
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A large mass of water vapor condensed to fine particles, at or just above the earth's surface; thick, obscuring mist.
noun
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A vaporized liquid, as insecticide, dispersed over a large area.
noun
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A state of mental dimness and confusion; blurred, bewildered state.
noun
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To be or become blurred, dimmed, or obscured.
verb
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(slang) To hurl (a baseball, etc.)
verb
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To make (a photograph, etc.) grayish in certain areas.
verb
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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.
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An opaque or semiopaque condensation of a substance floating in a region or forming on a surface.
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To fog is defined as to blur, confuse or cover with fog.

An example of fog is to have the steam from your shower cloud the mirror in the bathroom.

An example of fog is to tell someone so much new information that they can't keep it straight.

An example of fog is to fill a dance floor with artificial clouds using a machine.

verb
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An obscuring haze, as of atmospheric dust or smoke.
noun
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A mist or film clouding a surface, as of a window, lens, or mirror.
noun
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A state of mental vagueness or bewilderment.
noun
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Something that obscures or conceals; a haze.

Shrouded their actions in a fog of disinformation.

noun
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A new growth of grass appearing on a field that has been mowed or grazed.
noun
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Tall, decaying grass left standing after the cutting or grazing season.
noun
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(uncountable) A thick cloud that forms near the ground; the obscurity of such a cloud.
noun
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(uncountable) A mist or film clouding a surface.
noun
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A state of mind characterized by lethargy and confusion.

He did so many drugs, he was still in a fog three months after going through detox.

noun
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(photography) A silver deposit or other blur on a negative or developed photographic image.
noun
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(intransitive) To become covered with or as if with fog.
verb
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(intransitive) To become obscured in condensation or water.

The mirror fogged every time he showered.

verb
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(intransitive, photography) To become dim or obscure.
verb
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To cover with or as if with fog.
verb
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To obscure in condensation or water.
verb
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To make confusing or obscure.
verb
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(photography) To make dim or obscure.
verb
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To practice in a small or mean way; to pettifog.
verb
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A new growth of grass appearing on a field that has been mowed or grazed.
noun
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(UK, dialect) Tall and decaying grass left standing after the cutting or grazing season; foggage.

noun
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(Scotland) Moss.
noun
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To pasture cattle on the fog, or aftergrass, of; to eat off the fog from.
verb
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To make vague, hazy, or confused.

A memory that had been fogged by time.

verb
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A blur on a developed photographic image.
noun
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To cover or envelop with fog.
verb
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To cause to be obscured; cloud.
verb
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To obscure or dim (a photographic image).
verb
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To be covered with fog.
verb
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To be dimmed or obscured. Used of a photographic image.
verb
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A grayish area on a photograph or film.
noun
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To become surrounded or covered by fog.
verb
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The definition of a fog is a mist of water vapor that is low to the ground, a mist of another liquid, or a state of confusion or blurred vision.

An example of a fog is the cool gray cloud that covers San Francisco.

An example of a fog is the little cloud of insect spray over a corn field.

An example of a fog is what someone feels after a head injury.

noun
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Condensed water vapor in cloudlike masses lying close to the ground and limiting visibility.
noun
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A cloud of vaporized liquid, especially a chemical spray used in fighting fires.
noun
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To be blurred, clouded, or obscured.

My glasses fogged in the warm air.

verb
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To surround or cover with fog.
verb
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To blur; dim; obscure.
verb
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To confuse; bewilder.
verb
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A new growth of grass after cutting or grazing.
noun
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Long, rank grass left uncut or left standing.
noun
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(scot.) Moss.
noun
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Other Word Forms

Noun

Singular:
fog
Plural:
fogs

Origin of fog

  • Middle English fogge tall grass pū̆- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Perhaps of Scandinavian origin

    From American Heritage Dictionary of the English Language, 5th Edition

  • Origin uncertain; perhaps a back-formation from foggy. or perhaps related to the Dutch vocht and German feucht (moisture)

    From Wiktionary

  • Origin uncertain; compare Norwegian fogg.

    From Wiktionary