Definition of 'acuity'

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Noun

1. sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
      Synonyms: visual acuity sharp-sightedness
2. a quick and penetrating intelligence; "he argued with great acuteness"; "I admired the keenness of his mind"
      Synonyms: acuteness sharpness keenness

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