acuity.
Sharpness or acuteness, as of a needle, wit, etc.
Meaning & usage
Sharpness or acuteness, as of a needle, wit, etc.
The ability to think, see, or hear clearly.
The old woman with dementia lost her mental acuity.
Where this word comes from
From Middle English acuite, acuyte, from Middle French acuité, from Medieval Latin acuitas, irreg., from Latin acuō (“sharpen”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.