fog

¹

[ fog, fawg ]

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 def, mist ( def 1 ), smog ( def 1 ).
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.

   Synonyms: dim, darken, blur, cloud, trance, muddle, haze

   Antonyms: clarity

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)

, 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.

   Synonyms: obfuscate, obscure, muddy, confuse, befog, becloud

   Antonyms: clarify

3. to bewilder or perplex:

   to fog the mind.

   Synonyms: befuddle, daze, mystify, muddle

4. Photography. to produce fog on (a negative or positive).

verb (used without object)

, fogged, fog·ging.

1. to become enveloped or obscured with or as if with fog.

   Antonyms: clear

2. Photography. (of a negative or positive) to become affected by fog.

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.

fog

¹

/ fɒɡ /

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

verb

1. to envelop or become enveloped with or as if with fog
2. to confuse or become confused

   to 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

fog

²

/ fɒɡ /

noun

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

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.

Other Words From

• fogless adjective
• un·fogged adjective
• un·fogging adjective

Word History and Origins

Origin of fog¹

First recorded in 1535–45; perhaps by back formation from foggy; fog ²

Origin of fog²

First recorded in 1300–50; Middle English fogge, from Scandinavian; compare Norwegian fogg “long, scattered grass on damp ground”; further origin uncertain; foggy

Word History and Origins

Origin of fog¹

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

Origin of fog²

C14: probably of Scandinavian origin; compare Norwegian fogg rank grass

Idioms and Phrases

see in a fog .

Synonym Study

See cloud.

Example Sentences

A team of researchers from Jilin University, NYU Abu Dhabi's Smart Materials Lab, and the Center for Smart Engineering Materials, led by Professor of Chemistry Pance Naumov, has developed a new crystalline material that can harvest water from fog without any energy input.

From Science Daily

The crystals' narrow and light-translucent structures enable researchers to monitor the collection and condensation of fog droplets in real time by using light.

From Science Daily

In contrast, the process of condensation of aerial humidity or fog utilized by the Janus crystals is spontaneous under ambient conditions and can be performed without the input of energy, potentially providing an endless source of clean water.

From Science Daily

Horsetail Fall offers consistency in capturing natural wonder that beaches or even the Grand Canyon, sometimes hampered by fog, cannot deliver, Dunn said.

From Los Angeles Times

She was stunned to find that a lot of her symptoms - which included brain fog, low mood, joint pain and anxiety - became “vastly better” when she began using progesterone cream topically.

From BBC