Humidity vs. Fog

Dampness, especially that of the air.

The amount of water vapour in the air.

Moisture; dampness; a moderate degree of wetness, which is perceptible to the eye or touch; - used especially of the atmosphere, or of anything which has absorbed moisture from the atmosphere, as clothing.

The content of water vapor in the air, expressed as a percent of the maximum amount of water vapor that the air can hold at the given temperature; also called relative humidity. The capacity of the air to hold moisture increases with temperature, so if the temperature changes without changing the absolute content of the atmospheric moisture, the relative humidity will also change.

wetness in the atmosphere

Humidity is the concentration of water vapour present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye.

(uncountable) A thick cloud that forms near the ground; the obscurity of such a cloud.

(uncountable) A mist or film clouding a surface.

A state of mind characterized by lethargy and confusion.

Example: ‘He did so many drugs, he was still in a fog three months after going through detox.’;

(photography) A silver deposit or other blur on a negative or developed photographic image.

(computer graphics) Distance fog.

A new growth of grass appearing on a field that has been mowed or grazed.

Tall and decaying grass left standing after the cutting or grazing season; foggage.

(Scotland) Moss.

(intransitive) To become covered with or as if with fog.

(intransitive) To become obscured in condensation or water.

Example: ‘The mirror fogged every time he showered.’;

To become dim or obscure.

(transitive) To cover with or as if with fog.

(transitive) To disperse insecticide into (a forest canopy) so as to collect organisms.

(transitive) To obscure in condensation or water.

(transitive) To make confusing or obscure.

To make dim or obscure.

To practice in a small or mean way; to pettifog.

(transitive) To pasture cattle on the fog, or aftergrass, of; to eat off the fog from.

(intransitive) To become covered with the kind of grass called fog.

A second growth of grass; aftergrass.

Watery vapor condensed in the lower part of the atmosphere and disturbing its transparency. It differs from cloud only in being near the ground, and from mist in not approaching so nearly to fine rain. See Cloud.

A state of mental confusion.

Cloudiness or partial opacity of those parts of a developed film or a photograph which should be clear.

To pasture cattle on the fog, or aftergrass, of; to eat off the fog from.

To practice in a small or mean way; to pettifog.

Example: ‘Where wouldst thou fog to get a fee?’;

To envelop, as with fog; to befog; to overcast; to darken; to obscure.

To render semiopaque or cloudy, as a negative film, by exposure to stray light, too long an exposure to the developer, etc.

To show indistinctly or become indistinct, as the picture on a negative sometimes does in the process of development.

droplets of water vapor suspended in the air near the ground

an atmosphere in which visibility is reduced because of a cloud of some substance

confusion characterized by lack of clarity

make less visible or unclear;

Example: ‘The stars are obscured by the clouds’;

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)

Example: ‘the collision occurred in thick fog’;

an opaque mass of particles in the air

Example: ‘a whirling fog of dust’;

cloudiness which obscures the image on a developed negative or print.

a state or cause of perplexity or confusion

Example: ‘the coffee helped clear the fog in my brain’;

the grass which grows in a field after a crop of hay has been taken.

long grass left standing in a pasture and used as winter grazing.

(with reference to a glass surface) cover or become covered with steam

Example: ‘the windscreen was starting to fog up’; ‘hot steam drifted about her, fogging up the window’;

make (a film, negative, or print) obscure or cloudy.

bewilder or puzzle

Example: ‘she stared at him, confusion fogging her brain’;

make (an idea or situation) difficult to understand

Example: ‘the government has been fogging the issue’;

spray with an insecticide.

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.