BRAIN FOG Definition & Meaning

brain fog

[ breyn fog, fawg ]

Phonetic (Standard)IPA

noun

a mental state marked by difficulty remembering, concentrating, or thinking clearly, often caused by exhaustion, stress, or illness: For new parents, fatigue and brain fog seem inevitable.
He had so much brain fog that a single thought felt impossible.
For new parents, fatigue and brain fog seem inevitable.
Research has found that long COVID can cause brain fog and memory loss.

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51�Թ� History and Origins

Origin of brain fog¹

First recorded in 1850–55; brain ( def ) + fog ¹( def )

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Example Sentences

Examples have not been reviewed.

That’s especially so because the described symptoms — chronic fatigue, brain fog, insomnia, and dizziness among them — are not uncommon and often arise from other causes.

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If you’re dealing with brain fog or sweating in your clothes all the time, it can be embarrassing and you can lose confidence.

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Fadal consulted doctor after doctor to explain her symptoms of brain fog, nausea and a racing heart.

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It’s not just periods or brain fog or sleep.

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She said her symptoms included "dizziness, sometimes shortness of breath, there's sluggishness, there's pain in my chest and my ribs and I get brain fog sometimes".

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