a‧cu‧i‧ty /əˈkjuːəti, əˈkjuːɪti/ 
 noun [uncountable] formal[
Date: 1500-1600; 
Language: French; 
Origin: acuité, from Old French, from agu 'sharp', from Latin acutus;  ⇒ acute]
 the ability to think, see, or hear clearly: 
 A motorist needs good visual acuity.
 A motorist needs good visual acuity.  [TahlilGaran] Dictionary of Contemporary English ▲