chronic fatigue syndrome

NOUN

disorder involving extreme fatigue and weakness

Synonyms

WEAK

chronic fatigue and immune dysfunction syndrome fatigue disease fatigue syndrome myalgic encephalomyelitis post-viral fatigue syndrome postviral syndrome yuppie flu

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The study included 57 people diagnosed with chronic fatigue syndrome and 25 healthy individuals of similar age and activity level.

From Science Daily • Nov. 10, 2025

“You’re a kid and you have no authority over anyone,” said Lily, who has POTS, EDS, chronic fatigue syndrome, and chronic pain.

From Slate • Sep. 15, 2025

Diagnosed with chronic fatigue syndrome, as well as Pots - a condition which causes dizziness - and hypermobility, she struggled with attendance and anxiety.

From BBC • Aug. 13, 2025

Ms Beck, 63, who suffers from myalgic encephalomyelitis, which is also known as chronic fatigue syndrome, said she had planned to visit the area soon.

From BBC • Apr. 12, 2025

By giving the condition a name like "lymphoma" or "melanoma", "chronic fatigue syndrome" "Epstein-Barr syndrome" or "AIDS," "systemic yeast infection", "hepatitis" or what have, people think the doctor then understands their disease.

From How and When to Be Your Own Doctor by Solomon, Steve