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amnesia

American  
[am-nee-zhuh] / æmˈni ʒə /

noun

  1. loss of a large block of interrelated memories; complete or partial loss of memory caused by brain injury, shock, etc.


amnesia British  
/ æmˈniːzɪˌæk, æmˈniːsɪk, æmˈniːzjə, -ʒjə, -zɪə, -zɪk /

noun

  1. a defect in memory, esp one resulting from pathological cause, such as brain damage or hysteria

"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

amnesia Scientific  
/ ăm-nēzhə /
  1. Partial or total loss of memory, usually caused by brain injury or shock.


amnesia Cultural  
  1. A loss of memory, especially one brought on by some distressing or shocking experience.


Discover More

A common variant is selective amnesia; the term is applied to public officials who, when questioned about alleged wrongdoing, profess that they cannot remember.

Other Word Forms

Etymology

Origin of amnesia

1780–90; < New Latin < Greek amnēsía, variant of amnēstía oblivion; perhaps learnedly formed from mnē-, stem of mimnḗskesthai to remember ( cf. mnemonic) + -s- + -ia -ia. See amnesty

Explanation

When you have amnesia you can't remember what happened to you in the past. Amnesia is a total or partial memory loss. Some causes of amnesia are brain injury, disease, drug or alcohol abuse, and the deterioration of the brain associated with old age or dementia. With amnesia, memory can be regained, or it can be lost forever. It can be complete, encompassing everything you ever knew, or it can be specific to a time such as the hours leading up to an accident or trauma. If you forget the meaning of a word, it's not amnesia, that's just the way the mind works sometimes.

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Vocabulary lists containing amnesia

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.

"We played all the big clubs in Ibiza - Amnesia, Ku, Pacha. The 90s were really fun."

From BBC • Jan. 29, 2026

I find your exploration of both personal and cultural amnesia fascinating: Amnesia as knowledge, as inheritance, as freedom, as survival, as deliverance, as abundance...

From Los Angeles Times • Jul. 12, 2022

Amnesia spreads like a sickness, striking at random and forcing the unluckiest individuals to complete in a bizarre program that equips patients with a new identity.

From New York Times • Jun. 23, 2022

The Canadian rapper, who joined Travis Scott on stage for the Nov. 5 concert in Houston, Texas, has decided to pull the song "Splash Brothers" from French Montana's upcoming album "They Got Amnesia."

From Fox News • Nov. 18, 2021

SAD cases are admitted for free care at the Amnesia Sanctuary on Nomansan Island, a state-of-the-art facility where patients live comfortably, under strict quarantine, while the cure for their disease is sought.

From "The Mysterious Benedict Society" by Trenton Lee Stewart

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