acuity

noun

acu·​i·​ty ə-ˈkyü-ə-tē How to pronounce acuity (audio)
a-
plural acuities
: keenness of perception
hearing acuity
mental acuity

Did you know?

Do you have acuity or sensitivity?

Acuity is nearly synonymous with at least one sense of sensitivity, yet, as is so often the case with closely related words, there are subtle differences worth observing before you substitute one of these words for the other. Acuity does refer to a form of sensitivity, but it is most often applied to the perceptual senses (as in “visual acuity” or “auditory acuity”). It is also frequently used in reference to the intellect (as in “mental acuity”). Sensitivity has a broader range of meanings than acuity does, including “the capacity of being easily hurt.” It may be used of inanimate objects such as radios (“the sensitivity of the instruments was carefully calibrated”), a context in which acuity is unusual.

Examples of acuity in a Sentence

a worrisome deterioration in the acuity of his hearing over the years
Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
People love the opportunity to meet people and the benefits for mental acuity. R. Eric Thomas, The Denver Post, 31 Oct. 2024 Trump allies and the former president himself continued attacks on Harris' acuity at a rally in New York Sunday. Savannah Kuchar, USA TODAY, 28 Oct. 2024 Her argument is partly that the 78-year-old Trump has lost mental acuity on account of his advanced age, as was the chief line of attack that pushed President Biden from the race. Kevin Rector, Los Angeles Times, 18 Oct. 2024 The crew described sensations of rare clarity and acuity brought on by the sheer scale of risk. Cullen Murphy, The Atlantic, 11 Oct. 2024 See all Example Sentences for acuity 

Word History

Etymology

Middle English acuite "sharpness, acridity," borrowed from Middle French acuité, borrowed from Medieval Latin acuitāt-, acuitās, from Latin acu-, stem of acuere "to sharpen" + -itāt-, -itās -ity — more at acute

First Known Use

circa 1549, in the meaning defined above

Time Traveler
The first known use of acuity was circa 1549

Dictionary Entries Near acuity

Cite this Entry

“Acuity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acuity. Accessed 16 Nov. 2024.

Kids Definition

acuity

noun
acu·​ity ə-ˈkyü-ət-ē How to pronounce acuity (audio)
: sharpness of perception

Medical Definition

acuity

noun
acu·​ity ə-ˈkyü-ət-ē How to pronounce acuity (audio)
plural acuities
: keenness of sense perception
acuity of hearing
see visual acuity

More from Merriam-Webster on acuity

Last Updated: - Updated example sentences
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