[ uh-kyoo-i-tee ]
/ əˈkyu ɪ ti /


sharpness; acuteness; keenness: acuity of vision; acuity of mind.

Nearby words

  1. actuate,
  2. actuator,
  3. actus reus,
  4. acuate,
  5. acuff,
  6. aculeate,
  7. aculeus,
  8. acumen,
  9. acuminate,
  10. acupoint

Origin of acuity

1375–1425; late Middle English acuite < Old French < Medieval Latin, Late Latin acuitās, equivalent to Latin acu(ere) to sharpen or acū(tus) sharpened (see acute) + -itās -ity

Related formshy·per·a·cu·i·ty, nounnon·a·cu·i·ty, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for acuity

British Dictionary definitions for acuity


/ (əˈkjuːɪtɪ) /


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 for acuity

C15: from Old French, from Latin acūtus acute

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

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).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for acuity


[ ə-kyōōĭ-tē ]


Sharpness, clearness, and distinctness of perception or vision.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.