brain fog

noun

Definition of brain fog 

: 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

During her trips out West, de Castro—who, only a few months prior, had jumped on the cleanse bandwagon, citing its ability to help her lose weight, clear brain fog, and ease anxiety—noticed L.A.’s lack of juiceries. Colleen Leahey Mckeegan, Marie Claire, "The Business of Feeling Good," 11 July 2018 Side effects include fatigue, nausea, dizziness, and brain fog as a result of your body switching from burning carbs to burning fat. Sara Angle, Outside Online, "An Athlete's Guide to #Trending Diets," 20 Mar. 2018 Since reducing her medications, Ayala started experiencing an uptick in lupus symptoms like joint pain, brain fog, and fevers. Tatiana Walk-morris, SELF, "What Women of Color Need to Know About Lupus," 20 Feb. 2018 For example, has the reintroduction triggered any bloating or cramps, fatigue, brain fog, skin irritation, or sinus congestion? Julia Naftulin, Health.com, "You're Finishing Up Whole30. Here’s What You Should Do Next," 26 Jan. 2018 The pain, exhaustion, and brain fog grew so intense that taking my daughter to the playground was out of the question; even venturing down the block to the grocery store would leave me bedridden for hours. Leah Vincent, The Cut, "Me, Lady Gaga, and the Medical Establishment That Failed Us Both," 27 Sep. 2017 Dizziness, nausea, chronic fatigue, fainting, brain fog, and pain are just a few of the possible symptoms. Kelley O'brien, SELF, "My Chronic Illness Completely Changed the Way I Date," 13 Oct. 2017 The newest research in medical marijuana is microdosing, using a low dose of THC (somewhere between 2.5 and 5 milligrams) to reap the plant’s medicinal superpowers without any of the buzz or brain fog. Beth Hoeckel, Allure, "How Weed Can Actually Improve Your Sex Life," 29 Sep. 2017 The pain, exhaustion, and brain fog grew so intense that taking my daughter to the playground was out of the question Leah Vincent, The Cut, "Me, Lady Gaga, and the Medical Establishment That Failed Us Both," 27 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'brain fog.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of brain fog

1853, in the meaning defined above

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The first known use of brain fog was in 1853

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More Definitions for brain fog

brain fog

noun

Medical Definition of brain fog 

: 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), 23 Mar. 2013

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