hy·​per·​acu·​i·​ty ˌhī-pər-ə-ˈkyü-ə-tē How to pronounce hyperacuity (audio)
variants or hyper-acuity
: greater than normal acuteness of a sense
Her anarchy is perfectly balanced with her hyperacuity about tone and timbre and atmosphere and drift.Charles Baxter
especially : visual acuity that is better than twenty-twenty

Word History

First Known Use

1887, in the meaning defined above

Time Traveler
The first known use of hyperacuity was in 1887

Dictionary Entries Near hyperacuity

Cite this Entry

“Hyperacuity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperacuity. Accessed 18 Jul. 2024.

Medical Definition


hy·​per·​acu·​ity ˌhī-pə-rə-ˈkyü-ət-ē How to pronounce hyperacuity (audio)
plural hyperacuities
: greater than normal acuteness especially of a sense
specifically : visual acuity that is better than twenty-twenty compare grating acuity, stereoacuity, vernier acuity

More from Merriam-Webster on hyperacuity

Love words? Need even more definitions?

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