acuity

Noun	1.	acuity - sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart) sharp-sightedness, visual acuity visual modality, visual sense, vision, sight - the ability to see; the faculty of vision oxyopia - unusually acute vision
	2.	acuity - a quick and penetrating intelligence; "he argued with great acuteness"; "I admired the keenness of his mind" acuteness, keenness, sharpness intelligence - the ability to comprehend; to understand and profit from experience steel trap - an acute intelligence (an analogy based on the well known sharpness of steel traps); "he's as sharp as a steel trap"; "a mind like a steel trap"

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