Main Difference
The main difference between Fog and Frost is that the Fog is a atmospheric phenomenon and Frost is a coating or deposit of ice that may form in humid air in cold conditions, usually overnight
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Fog
Fog is a visible aerosol consisting of tiny water droplets or ice crystals suspended in the air at or near the Earth’s surface. Fog can be considered a type of low-lying cloud, usually resembling stratus, and is heavily influenced by nearby bodies of water, topography, and wind conditions. In turn, fog has affected many human activities, such as shipping, travel, and warfare.
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Frost
Frost is a thin layer of ice on a solid surface, which forms from water vapor in an above freezing atmosphere coming in contact with a solid surface whose temperature is below freezing, and resulting in a phase change from water vapor (a gas) to ice (a solid) as the water vapor reaches the freezing point. In temperate climates, it most commonly appears on surfaces near the ground as fragile white crystals; in cold climates, it occurs in a greater variety of forms. The propagation of crystal formation occurs by the process of nucleation.
The ice crystals of frost form as the result of fractal process development. The depth of frost crystals varies depending on the amount of time they have been accumulating, and the concentration of the water vapor (humidity). Frost crystals may be invisible (black), clear (translucent), or white; if a mass of frost crystals scatters light in all directions, the coating of frost appears white.
Types of frost include crystalline frost (hoar frost, hoarfrost, radiation frost) from deposition of water vapor from air of low humidity, white frost in humid conditions, window frost on glass surfaces, advection frost from cold wind over cold surfaces, black frost without visible ice at low temperatures and very low humidity, and rime under supercooled wet conditions.Plants that have evolved in warmer climates suffer damage when the temperature falls low enough to freeze the water in the cells that make up the plant tissue. The tissue damage resulting from this process is known as “frost damage”. Farmers in those regions where frost damage is known to affect their crops often invest in substantial means to protect their crops from such damage.
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Fog (noun)
A thick cloud that forms near the ground; the obscurity of such a cloud.
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Fog (noun)
A mist or film clouding a surface.
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Fog (noun)
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.”
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Fog (noun)
A silver deposit or other blur on a negative or developed photographic image.
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Fog (noun)
Distance fog.
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Fog (noun)
A new growth of grass appearing on a field that has been mowed or grazed.
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Fog (noun)
Tall and decaying grass left standing after the cutting or grazing season; foggage.
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Fog (noun)
Moss.
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Fog (verb)
To become covered with or as if with fog.
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Fog (verb)
To become obscured in condensation or water.
“The mirror fogged every time he showered.”
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Fog (verb)
To become dim or obscure.
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Fog (verb)
To cover with or as if with fog.
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Fog (verb)
To disperse insecticide into (a forest canopy) so as to collect organisms.
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Fog (verb)
To obscure in condensation or water.
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Fog (verb)
To make confusing or obscure.
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Fog (verb)
To make dim or obscure.
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Fog (verb)
To practice in a small or mean way; to pettifog.
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Fog (verb)
To pasture cattle on the fog, or aftergrass, of; to eat off the fog from.
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Fog (verb)
To become covered with the kind of grass called fog.
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Frost (noun)
A cover of minute ice crystals on objects that are exposed to the air. Frost is formed by the same process as dew, except that the temperature of the frosted object is below freezing.
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Frost (noun)
The cold weather that causes these ice crystals to form.
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Frost (noun)
Coldness or insensibility; severity or rigidity of character.
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Frost (noun)
The act of freezing; the congelation of water or other liquid.
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Frost (noun)
A shade of white, like that of frost.
“color panel|ECFCFC”
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Frost (noun)
A disappointment; a cheat.
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Frost (verb)
To cover with frost.
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Frost (verb)
To become covered with frost.
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Frost (verb)
To coat (something, e.g. a cake) with icing to resemble frost.
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Frost (verb)
To anger or annoy.
“I think the boss’s decision frosted him a bit.”
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Frost (verb)
To sharpen (the points of a horse’s shoe) to prevent it from slipping on ice.
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Fog (noun)
a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth’s surface which obscures or restricts visibility (to a greater extent than mist; strictly, reducing visibility to below 1 km)
“the collision occurred in thick fog”
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Fog (noun)
an opaque mass of particles in the air
“a whirling fog of dust”
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Fog (noun)
cloudiness which obscures the image on a developed negative or print.
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Fog (noun)
a state or cause of perplexity or confusion
“the coffee helped clear the fog in my brain”
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Fog (noun)
the grass which grows in a field after a crop of hay has been taken.
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Fog (noun)
long grass left standing in a pasture and used as winter grazing.
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Fog (verb)
(with reference to a glass surface) cover or become covered with steam
“the windscreen was starting to fog up”
“hot steam drifted about her, fogging up the window”
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Fog (verb)
make (a film, negative, or print) obscure or cloudy.
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Fog (verb)
bewilder or puzzle
“she stared at him, confusion fogging her brain”
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Fog (verb)
make (an idea or situation) difficult to understand
“the government has been fogging the issue”
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Fog (verb)
spray with an insecticide.
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Frost (noun)
a deposit of small white ice crystals formed on the ground or other surfaces when the temperature falls below freezing
“the lanes were glistening with frost”
“it is not unusual for buds to be nipped by frost”
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Frost (noun)
a weather condition or period of cold weather in which deposits of frost form
“there have been several sharp frosts recently”
“following two or three nights of hard frost, my garden is a wreck”
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Frost (noun)
a person’s cold or unfriendly manner
“Caroline was shocked to hear the frost in her brother’s voice”
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Frost (noun)
a failure
“even the state soirées were a frost”
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Frost (verb)
cover (something) with or as if with frost; freeze
“shop windows were still frosted over”
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Frost (verb)
become covered with small ice crystals
“no one has managed to stop outdoor heat exchangers frosting up during winter”
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Frost (verb)
damage or otherwise affect as a result of frost.
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Frost (verb)
decorate (a cake or biscuit) with icing
“the cake Mama had just frosted”