Alzheimer's disease

American  

[ahlts-hahy-merz, alts-, awlts-] / ˈɑlts haɪ mərz, ˈælts-, ˈɔlts- /

Or Alzheimer disease

noun

Pathology.

1. a common form of dementia, believed to be caused by changes in the brain, usually beginning in late middle age, characterized by memory lapses, confusion, emotional instability, and progressive loss of mental ability.

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Alzheimer's disease British  

/ ˈæltsˌhaɪməz /

noun

1. Often shortened to: Alzheimer's.  a disorder of the brain resulting in a progressive decline in intellectual and physical abilities and eventual dementia

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Alzheimer's disease Scientific  

/ äls′hī-mərz /

1. A progressive, degenerative disease of the brain, commonly affecting the elderly, and associated with the development of amyloid plaques in the cerebral cortex. It is characterized by confusion, disorientation, memory failure, speech disturbances, and eventual dementia. The cause is unknown. Alzheimer's disease is named for its identifier, German psychiatrist Alois Alzheimer (1864–1915).

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Alzheimer's disease Cultural  

1. A disease in which mental capacity decreases because of the breakdown of brain cells.

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Discover More

Alzheimer's disease is a major cause of loss of intellectual function in middle-aged and elderly people.

Etymology

Origin of Alzheimer's disease

Named after Alois Alzheimer (1864–1915), German neurologist, who described it in 1907

Example Sentences

Alzheimer's disease is the most common cause of dementia, and the Alzheimer's Society said it is a common misconception to question whether dementia is a normal part of ageing.

From BBC • Jun. 5, 2026

Jon Snow, the lead presenter of Channel 4 News for 32 years, has revealed he has Alzheimer's disease.

From BBC • Jun. 5, 2026

The drug industry has been trying for years to develop tricks to shuttle the drugs that treat Alzheimer’s disease through the body’s protective brain-blood barrier, which blocks 99% of a dose from reaching the brain.

From Barron's • Jun. 4, 2026

Antibody drugs that treat Alzheimer’s disease have been on the market for several years.

From Barron's • Jun. 3, 2026

She was just beginning her long struggle with Alzheimer's disease, and each time I entered the room, I felt the need to reintroduce myself and set her at ease.

From "Me Talk Pretty One Day" by David Sedaris