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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.


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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Alzheimer's disease Scientific  
/ älshī-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).


Alzheimer's disease Cultural  
  1. A disease in which mental capacity decreases because of the breakdown of brain cells.


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

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

See Examples For:

Developing Alzheimer’s disease was associated with the largest increase in switching to traditional Medicare.

From MarketWatch Sep. 2, 2026

Fjell notes that Alzheimer's disease remains extremely difficult to treat.

From Science Daily Sep. 2, 2026

Then two years ago, he was diagnosed with Alzheimer's disease.

From BBC Aug. 31, 2026

The FDA cleared a blood test developed by Roche and Eli Lilly to identify Alzheimer’s disease symptoms.

From The Wall Street Journal Aug. 24, 2026

“Because he has something called Alzheimer’s disease, Merci,” he says.

From "Merci Suárez Changes Gears" by Meg Medina

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