sharpness; acuteness; keenness: acuity of vision;acuity of mind.
- hy·per·a·cu·i·ty, noun
- non·a·cu·i·ty, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use acuity in a sentence
Figuring out how memories form may ultimately help us learn more about ourselves and keep our mental acuity intact.How technology can let us see and manipulate memories | Joshua Sariñana | August 25, 2021 | MIT Technology Review
They relished this secondary seek-and-find game, which made its way into academic studies and mental acuity tests, and later turned Nina herself into a reluctant celebrity.Al Hirschfeld: Drawing entertainers with pen and ink, elegance and wit | Michael Cavna | July 30, 2021 | Washington Post
For instance, in one study looking at the impact of swimming on mental acuity in the elderly, researchers concluded that swimmers had improved mental speed and attention compared with nonswimmers.Swimming is the ultimate brain exercise. Here’s why. | Purbita Saha | July 28, 2021 | Popular-Science
As babies get in the five month to one year range, they can see objects farther away and with more acuity.
Such cheap, tiny models could help students learn about proteins regardless of vision acuity, Shaw says.A sweet father-son bond inspires tasty new molecule models | Carmen Drahl | May 28, 2021 | Science News
In the classic skillset of piloting, mental acuity, and its coordination with hand and foot movements, is equally vital.Flight 8501 Poses Question: Are Modern Jets Too Automated to Fly? | Clive Irving | January 4, 2015 | THE DAILY BEAST
Borges, at first, was oblivious to her absolute lack of intellectual acuity.Borges Had A Genius For Literature But Not Love Or Much Else | Allen Barra | October 24, 2014 | THE DAILY BEAST
But it is the emotional acuity that shines through all these works that makes your heart sing.
Beyond the mental acuity needed to focus through the pain, the young woman must also abide by a strict diet.Facial Tattoos: The Tribal Female Rite in Papua New Guinea | Brandon Presser | August 11, 2014 | THE DAILY BEAST
The unblinking electronic eye was an extension of his own reflexes and acuity—when the red light went on, all else was excluded.
In full acuity of vision even high degrees of hypermetropia are no trouble to children.
The examination showed for the right eye hypermetropia 1·5, for the left myopia 3·5 D.; full acuity of vision on both sides.
Full visual acuity on both sides—in the first examination slight myopia - ·75 D. is specified, afterwards emmetropia.
The acuity of hearing was no longer so pronounced and the sense of refreshment, although still present, was not intense.The Blue Germ | Martin Swayne
The doctor must correct, as far as possible, the want of acuity noticed.Mentally Defective Children | Alfred Binet
British Dictionary definitions for acuity
keenness or acuteness, esp in vision or thought
the capacity of the eye to see fine detail, measured by determining the finest detail that can just be detected
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