hy·​perm·​ne·​sia | \ ˌhī-(ˌ)pərm-ˈnē-zh(ē-)ə \

Definition of hypermnesia 

: abnormally vivid or complete memory or recall of the past

Keep scrolling for more

Other Words from hypermnesia

hypermnesic \ ˌhī-​(ˌ)pərm-​ˈnē-​zik , -​sik \ adjective

Can You Remember the History of hypermnesia?

Perhaps the most famous individual to exhibit hypermnesia was a Russian man known as "S," whose amazing photographic memory was studied for 30 years by a psychologist in the early part of the 20th century. "Hypermnesia" sometimes refers to cases like that of "S," but it can also refer to specific instances of heightened memory (such as those brought on by trauma or hypnosis) experienced by people whose memory abilities are unremarkable under ordinary circumstances. The word hypermnesia, which has been with us since at least 1882, was created in New Latin as the combination of "hyper-" (meaning "beyond" or "super") and "-mnesia" (patterned after "amnesia"). It ultimately derives from the Greek word mnasthai, meaning "to remember."

First Known Use of hypermnesia

1882, in the meaning defined above

History and Etymology for hypermnesia

New Latin, from hyper- + -mnesia (as in amnesia)

Keep scrolling for more

Learn More about hypermnesia

Share hypermnesia

Listen to Our Podcast about hypermnesia

Statistics for hypermnesia

Look-up Popularity

Time Traveler for hypermnesia

The first known use of hypermnesia was in 1882

See more words from the same year

Keep scrolling for more

More Definitions for hypermnesia


hy·​perm·​ne·​sia | \ ˌhī-(ˌ)pərm-ˈnē-zh(ē-)ə \

Medical Definition of hypermnesia 

: abnormally vivid or complete memory or recall of the past (as at times of extreme danger)

Other Words from hypermnesia

hypermnesic \ -​ˈnē-​zik, -​sik \ adjective

More from Merriam-Webster on hypermnesia

Britannica.com: Encyclopedia article about hypermnesia

Comments on hypermnesia

What made you want to look up hypermnesia? Please tell us where you read or heard it (including the quote, if possible).


a person who helps groups work together

Get Word of the Day daily email!

Test Your Vocabulary

Liar, Liar Quiz

  • alt-5761dbe2ba986
  • Someone who pretends to be sick in order to avoid work is a:
True or False

Test your knowledge - and maybe learn something along the way.


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!