Acuity

//əˈkjuːɪti// noun

Definitions

Noun
  1. 1
    Sharpness or acuteness, as of a needle, wit, etc.
  2. 2
    a quick and penetrating intelligence wordnet
  3. 3
    The ability to think, see, or hear clearly. figuratively

    "The old woman with dementia lost her mental acuity."

  4. 4
    sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart) wordnet

Etymology

From Middle English acuite, acuyte, from Middle French acuité, from Medieval Latin acuitas, irreg., from Latin acuō (“sharpen”).

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