|1.||[ noun ] (physiology,ophthalmology) sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)|
|Related terms:||sight oxyopia|
|2.||[ noun ] (psychology) a quick and penetrating intelligence|
|Synonyms:||sharpness keenness acuteness|
"he argued with great acuteness" "I admired the keenness of his mind"
|Related terms:||intelligence steel_trap|