The definition of acuity is seeing or understanding things clearly.
20/20 vision is an example of normal visual acuity.
acuteness; keenness, as of thought or vision
Origin of acuityFrench acuité from Medieval Latin acuitas from Classical Latin acus, needle: see acerose
Acuteness of vision or perception; keenness.
Origin of acuityMiddle English acuite from Old French ultimately from Latin acūtus sharp ; see acute .
From Middle French acuité, from Medieval Latin acuitas, irreg., from Latin acuō (“sharpen”).