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brain fog
noun
: a usually temporary state of diminished mental capacity marked by inability to concentrate or to think or reason clearly
Examples of brain fog in a Sentence
Recent Examples on the Web
Which means that for 20 years, many of them have been suffering terrible symptoms, including hot flashes, migraines, mood swings, brain fog and insomnia, that could have been greatly lessened by MHT.
—Mary McNamara, The Mercury News, 15 May 2024
After struggling with severe memory loss and brain fog, doctors became concerned when one of his brain scans showed a dark spot, which neurologists believed was a brain tumor.
—Vanessa Etienne, Peoplemag, 8 May 2024
That’s about 17 million people currently dealing with issues like brain fog or intense fatigue, which can interfere with their life and involvement in the workforce.
—Isabella Cueto, STAT, 11 Apr. 2024
The man is dealing with the symptoms of a concussion, like brain fog and sensitivity to light and sound, the attorney said.
—James Hartley, Fort Worth Star-Telegram, 3 Apr. 2024
Stress can have adverse effects on almost any bodily system, with symptoms ranging from brain fog and stomachaches to serious cardiovascular problems.
—Avery Hurt, Discover Magazine, 19 Mar. 2024
Patients can suffer from a range of symptoms, including profound exhaustion, brain fog and post-exertional malaise, an escalation in symptoms following exertion.
—Will Stone, NPR, 23 Feb. 2024
Symptoms of menopause can include hot flashes, cardiac effects, brain fog and other mental heath effects.
—Victoria Bisset, Washington Post, 22 Feb. 2024
In addition to having overwhelming fatigue, people with ME/CFS experience a range of other symptoms such as brain fog, hypersensitivity to light and short-term memory loss.
—Kamal Nahas, Scientific American, 21 Feb. 2024
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'brain 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
First Known Use
1853, in the meaning defined above
Dictionary Entries Near brain fog
Cite this Entry
“Brain fog.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brain%20fog. Accessed 23 May. 2024.
Medical Definition
brain fog
noun
: a usually temporary state of diminished mental capacity marked by inability to concentrate or to think or reason clearly
This brain fog can be a result of being overly stressed, tired, carrying extra weight, consuming too many calories or consistently consuming a diet poor in nutrients.—Kylie Helgens, The Gazette (Cedar Rapids, Iowa)
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