foggy
Americanadjective
-
thick with or having much fog; misty.
a foggy valley;
a foggy spring day.
-
covered or enveloped as if with fog.
a foggy mirror.
-
(of thinking, ideas, etc.) dim or unclear as if obscured by fog; vague.
I haven't the foggiest notion of where she went.
- Synonyms:
- muddleheaded, muddled, fuzzy, befuddled
-
Difficulties with memory, concentration, attention, and fatigue left me feeling foggy and muddled much of the time.
-
Photography. affected by fog.
adjective
-
thick with fog
-
obscure or confused
-
another word for fogged
-
no idea whatsoever
I haven't the foggiest
Other Word Forms
Derived Forms
Inflected Forms
Adjectives
Etymology
Origin of foggy
First recorded in 1520–30; fog 2 + -y 1; original sense was “marshy, thick, murky”
Explanation
Something that's foggy is cloudy or murky, filled with fog. A foggy view is blurred and indistinct, just like a foggy mind. Driving on a foggy road can be tricky, since it's more or less like driving inside a cloud. When the inside of your head feels this way — blurry, clouded, and vague — you can also used foggy in a figurative way: "Her memory grew foggy as the years went by." Experts aren't sure whether foggy or fog came first, but in either case they suspect a Scandinavian root.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"A lot of people were suffering from chronic fatigue, constant headaches, low vitamin B12, which was subsequently causing things like heart palpitations and very foggy heads," she said.
From BBC • May 18, 2026
And somewhere above the foggy hills of Shillong, a young rapper seemed to have understood that long before everyone else did.
From BBC • May 15, 2026
Growing up on his family’s East Contra Costa County farm in the 1960s, Dennis Baldocchi thought the whole world was foggy until a friend took him on a hike that climbed above it.
From The Wall Street Journal • Mar. 29, 2026
On a foggy winter morning captain Khetsopon Nopsiri led a six-strong Thai army patrol along dirt tracks through the forest, assault rifles at the ready.
From Barron's • Mar. 10, 2026
The day was foggy, and a heavy, cross sea and lumpy waves kept the men miserably wet.
From "Shipwreck at the Bottom of the World" by Jennifer Armstrong
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
