acuity

Definitions

Sharpness or keenness of thought, vision, or hearing.

The ability to perceive, understand, or interpret with great clarity.

Examples

The elderly professor still possessed remarkable mental acuity, solving complex equations in seconds.

Regular eye exams are essential for maintaining the visual acuity required to drive safely at night.

Synonyms

sharpness keenness astuteness insight discernment perceptiveness acuteness

Antonyms

dullness stupidity insensitivity obtuse ignorance bluntness opacity