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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Quality rest seven to eight hours per night for adults) can help reduce fatigue, irritability, and brain fog commonly associated with keto flu. Lauren Panoff, Mph, Rd, Verywell Health, 5 Aug. 2024 Older people are also at higher risk for longer-term symptoms, known as long COVID, which can include fatigue, brain fog and breathlessness. Adrianna Rodriguez, USA TODAY, 22 July 2024 In adults, the most common long COVID symptoms include fatigue and brain fog, but for children the condition can look different. Samuel Axon, Ars Technica, 27 Sep. 2024 Nearly 1 in 3 Americans may have an undiagnosed iron deficiency, a problem that can lead to fatigue, brain fog and difficulty concentrating, a new study suggests. Linda Carroll, NBC News, 24 Sep. 2024 See all Example Sentences for brain fog 

Word History

First Known Use

1853, in the meaning defined above

Time Traveler
The first known use of brain fog was in 1853

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 Nov. 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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