\ ˈfȯg How to pronounce fog (audio) , fäg \

Definition of fog

 (Entry 1 of 2)

1a : 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
3a : 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


fogged; fogging

Definition of fog (Entry 2 of 2)

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

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Other Words from fog


fogless \ ˈfȯg-​ləs How to pronounce fogless (audio) , ˈfäg-​ \ adjective

Synonyms & Antonyms for fog

Synonyms: Noun

Synonyms: Verb

Antonyms: Verb

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Examples of fog in a Sentence

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
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Recent Examples on the Web: Noun Vanessa Bryant, who filed the suit the same day as her husband’s large public memorial service in February, alleged that Zobayan was careless and negligent to fly in the fog and should have aborted the flight. NBC News, "Families sue helicopter company in deadly Kobe Bryant crash," 21 Apr. 2020 And now most of the buildings and landmarks had vanished in the fog. Carl Nolte,, "Time-traveling into San Francisco’s past and future," 18 Apr. 2020 The helicopter crashed into a Calabasas hillside late last month in heavy fog, killing the retired Laker legend, his 13-year-old daughter Gianna and seven others on their way to a youth basketball game. CBS News, "Sheriff says Kobe Bryant crash scene photos were shared by 8 deputies: "Sense of betrayal"," 3 Mar. 2020 The setting, a Brooklyn bar lined in neon lights with a dance floor covered in fog, is the perfect stage for lusty behavior after the sun goes down. Essence, "J. Cole's Dreamville Drops Deluxe 'Revenge Of The Dreamers III' With New Songs From Ari Lennox And EARTHGANG," 17 Jan. 2020 One fallout from the Duke of York’s involvement in the Jeffrey Epstein scandal is that journalists began to probe into his personal finances which have long shrouded in a fog of pea-soup impenetrability. David Mcclure, Town & Country, "How Realistic is Financial Independence for Prince Harry and Meghan Markle?," 11 Jan. 2020 Mercury levels in fog are not high enough to pose a danger to humans. Brigit Katz, Smithsonian, "Mercury-Laden Fog May Be Poisoning California’s Mountain Lions," 2 Dec. 2019 After disappearing in the fog, Jackson (Jesse Williams) helps a man in a dangerous situation, as his relationship with Maggie (Kelly McCreary) comes to a new crossroad. Chuck Barney, The Mercury News, "Fall TV 2019: Where our favorite returning shows left off," 18 Sep. 2019 Whatever Pelosi’s plans might have been, they’ve been lost in a fog of anti-Semitism and left-wing radicalism. Matthew Continetti, National Review, "Pelosi’s House of Pain," 13 July 2019 Recent Examples on the Web: Verb Pull up your mask If there’s too much space between the top of your face mask and the bottom of your glasses, the likelihood that your glasses will fog up increases. Eliza Huber,, "Face Mask Fogging Your Glasses? Here’s A Quick Fix," 7 May 2020 The coating, unfortunately, also appeared to protect the lenses from Ms. Lamb’s anti-fogging efforts. New York Times, "Why does my mask make my glasses fog?," 21 Apr. 2020 The final episode of the show's transcendent fifth season featured Kim surprising in the aftermath of that chilling Lalo confrontation — and further fogging her moral compass. Dan Snierson,, "Better Call Saul finale: Bob Odenkirk and Rhea Seehorn break down Kim's shocking pitch to Jimmy," 21 Apr. 2020 Before the arrival of coffee and tea in the West in the 1600s, alcohol—which was more sanitary than water—was the drug that dominated, and fogged, human minds. Michael Pollan, The Atlantic, "Capitalism’s Favorite Drug," 6 Apr. 2020 Planes are being fogged with a special solution of chemicals meant to kill the coronavirus. David Gelles, New York Times, "Inside American Airlines’ Scramble as Virus Grounds Jets by Hundreds," 25 Mar. 2020 Planes that arrive from China are fogged, which takes up to two hours. Scott Mcmurren, Anchorage Daily News, "Traveling soon? Here’s how uncertainty around the novel coronavirus might affect you.," 7 Mar. 2020 Invest in quality goggles that won’t fog up on the slopes, like these stylish Cyrius goggles by French brand Julbo. Terry Ward, Condé Nast Traveler, "Ski Trip Packing List: All the Essentials for a Weekend On (and Off) the Slopes," 29 Jan. 2020 With the sun setting behind us, her relentless two-hour set was a reminder that a killer techno show doesn’t require a sweaty, fogged-out club to blow your mind. Andrea Domanick, Billboard, "The Best & Worst of CRSSD 2019, a Boutique Electronic Festival for the Streaming Era," 3 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fog.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fog


1544, in the meaning defined at sense 1a


circa 1592, in the meaning defined at transitive sense 1

History and Etymology for fog


probably back-formation from foggy

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Learn More about fog

Statistics for fog

Last Updated

14 May 2020

Cite this Entry

“Fog.” Dictionary, Merriam-Webster, Accessed 27 May. 2020.

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More Definitions for fog


How to pronounce fog (audio)

English Language Learners Definition of fog

 (Entry 1 of 2)

: many small drops of water floating in the air above the ground, the sea, etc.
: a state of mental confusion



English Language Learners Definition of fog (Entry 2 of 2)

: to cover or fill (something) with small drops of water : to make (something) foggy
: to become foggy
: to make (someone or something) confused


\ ˈfȯg How to pronounce fog (audio) , ˈfäg \

Kids Definition of fog

 (Entry 1 of 2)

1 : tiny drops of water floating in the air at or near the ground
2 : a confused state of mind I woke up in a fog.


fogged; fogging

Kids Definition of fog (Entry 2 of 2)

: to cover or become covered with tiny drops of water Steam from the shower fogged the mirror.
\ ˈfäg, ˈfȯg How to pronounce fog (audio) \
fogged; fogging

Medical Definition of fog

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

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More from Merriam-Webster on fog

Thesaurus: All synonyms and antonyms for fog

Rhyming Dictionary: Words that rhyme with fog

Spanish Central: Translation of fog

Nglish: Translation of fog for Spanish Speakers

Britannica English: Translation of fog for Arabic Speakers Encyclopedia article about fog

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