fog

1 of 2

noun

ˈfȯg How to pronounce fog (audio)
fäg
1
a
: vapor condensed to fine particles of water suspended in the lower atmosphere that differs from cloud only in being near the ground
b
: a fine spray or a foam for firefighting
2
: a murky condition of the atmosphere or a substance causing it
3
a
: a state of confusion or bewilderment
spent the morning in a fog
b
: something that confuses or obscures
hid behind a fog of rhetoric
4
: cloudiness or partial opacity in a developed photographic image caused by chemical action or stray radiation
fogless
ˈfȯg-ləs How to pronounce fog (audio)
ˈfäg-
adjective

fog

2 of 2

verb

fogged; fogging

transitive verb

1
: to cover, envelop, or suffuse with or as if with fog
fog the barns with pesticide
2
: to make obscure or confusing
accusations which fogged the real issues
3
: to make confused
4
: to produce fog on (something, such as a photographic film) during development

intransitive verb

1
: to become covered or thick with fog
2
a
: to become blurred by a covering of fog or mist
b
: to become indistinct through exposure to light or radiation

Example Sentences

Noun Heavy fog made it difficult to see the road. a climate marked by heavy fogs The fog reduced visibility to a quarter of a mile. This problem has me in a fog. Verb The steam from the pot was fogging the window near the stove. The bathroom was all fogged up after my shower. politicians who try to fog the issue instead of taking a stand See More
Recent Examples on the Web
Noun
Elsewhere in the Midwest, Minnesota and Wisconsin expected areas of freezing fog with less than a quarter mile of visibility into the weekend, the weather service said. Arkansas Online, 4 Mar. 2023 Elsewhere in the Midwest, Minnesota and Wisconsin expected areas of freezing fog with less than a quarter mile of visibility into the weekend, the weather service said. CBS News, 4 Mar. 2023 With visibility down to a quarter-mile because of freezing fog, the FedEx pilots didn't see the Southwest jet until the last seconds. David Koenig, ajc, 2 Mar. 2023 Clearing skies overnight have led to some fog formation across the Portland/Vancouver area early Wednesday. oregonlive, 1 Mar. 2023 With cbd oil for ed, this easy-to-use product has been created with a few key ingredients that may provide relief from conditions such as chronically high-stress levels, inflammation, and mental fog. Amber Smith, Discover Magazine, 27 Feb. 2023 After clouds and patchy fog this morning, increasing sunshine by afternoon should get us at least well into the 50s. Molly Robey, Washington Post, 26 Feb. 2023 Current temperatures at Midway Airport were at 31 degrees with light rain and fog. Deanese Williams-harris, Chicago Tribune, 16 Feb. 2023 While there could be some brief patchy fog this morning, it’s not expected to be terribly thick or widespread. Dallas News, 9 Feb. 2023
Verb
Dressed in all black, the Spy Kids alum portrays Trainor's chauffeur, as well as a fan whose glasses fog up just at the sight of the pop star. Robin Raven, Peoplemag, 30 Jan. 2023 That snow can pile up and clog your vents, causing your goggles to fog. Leslie Hsu Oh, Travel + Leisure, 30 Jan. 2023 Additionally, the fans don’t cool as expected; people overheat and faceplates fog. Kate Greene, Discover Magazine, 7 June 2013 What to Consider: There’s no case included, and the lens does fog up after some time. Leslie Hsu Oh, Travel + Leisure, 30 Jan. 2023 Sometimes moving your camera from a cold environment to a warmer one will cause your lens to fog. oregonlive, 21 Dec. 2022 The Bay Area is no stranger to fog coming off the ocean. Gerry Díaz, San Francisco Chronicle, 15 Dec. 2022 The custom vent and lock systems keep you fog free and on the move. Aaron H. Bible, Popular Mechanics, 12 Jan. 2023 Ask a scientist to explain why the California coast experiences fog in the summer, and the answer will come in paragraphs, not mere words. John Branch, New York Times, 14 Sep. 2022 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'fog.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Noun

probably back-formation from foggy

First Known Use

Noun

1544, in the meaning defined at sense 1a

Verb

circa 1592, in the meaning defined at transitive sense 1

Time Traveler
The first known use of fog was in 1544

Dictionary Entries Near fog

Cite this Entry

“Fog.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fog. Accessed 30 Mar. 2023.

Kids Definition

fog

1 of 2 noun
ˈfȯg How to pronounce fog (audio)
ˈfäg
1
a
: fine particles of water floating in the atmosphere near the ground
b
: a fine spray or a foam for firefighting
2
: a gloomy condition of the atmosphere or a substance causing it
3
: a state of mental confusion
spent the morning in a fog

fog

2 of 2 verb
fogged; fogging
1
: to cover or become covered with or as if with fog
2
: to make confused

Medical Definition

fog

transitive verb
fogged; fogging
: to blur (a visual field) with lenses that prevent a sharp focus in order to relax accommodation before testing vision

More from Merriam-Webster on fog

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!


What Did You Just Call Me?

  • brown chihuahua sitting on the floor with squinting eyes looking at the camera
  • Before we went to her house, Hannah told us her aunt was a flibbertigibbet.
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?

PLAY