brain fog

[ breyn-fog, fawg ]

noun
  1. a mental state marked by difficulty remembering, concentrating, or thinking clearly, often caused by exhaustion, stress, or illness: 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.

Origin of brain fog

1
First recorded in 1850–55; brain + fog1
  • Also brain-fog, brain·fog .

Words Nearby brain fog

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024