- Sharpness or keenness of insight, judgment, or perception.
- Sharpness or clarity of vision.
- Keenness or sensitivity of a sense or faculty.
Late 16th century: from latin acuitas, from acuere "sharpen".
- His acuity in solving problems was unmatched.
- Her acuity in spotting small details was impressive.
- The acuity of his sense of hearing was remarkable.
- The acuity of his political judgment was a major asset.
- Her acuity in negotiations was the key to her success.