- sharpness; acuteness; keenness: acuity of vision; acuity of mind.
Origin of acuity
Examples from the Web for acuity
The unblinking electronic eye was an extension of his own reflexes and acuity—when the red light went on, all else was excluded.‘A Fiery Tribune’
September 1, 2013
His remarkable memory has lost its acuity, and he tires easily.Nelson Mandela Recovering in South Africa After Brief Hospital Scare
February 27, 2012
The doctor must correct, as far as possible, the want of acuity noticed.Mentally Defective Children
The acuity of hearing was no longer so pronounced and the sense of refreshment, although still present, was not intense.The Blue Germ
The portraits of certain artists in this unique volume recite the history of the critic's acuity and clairvoyance.Unicorns
When they struck the water there was a hiss, which grew in volume and acuity as they skimmed the waves.Riviera Towns
Herbert Adams Gibbons
Despite the breadth and acuity of his observations, Granger suggested remarkedly few changes.Integration of the Armed Forces, 1940-1965
Morris J. MacGregor, Jr.
- 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
Word Origin and History for acuity
early 15c., from Middle French acuité (16c.) or directly from Medieval Latin acuitatem (nominative acuitas) "sharpness," from Latin acuere "to sharpen," related to acus "needle," acuere "to sharpen," from PIE root *ak- "rise to a point, be sharp" (see acrid).
- Sharpness, clearness, and distinctness of perception or vision.