the ability to hear, see, or think accurately and clearly: Tiredness also affects visual acuity. He was a man of great political acuity.

Examples of Acuity in a sentence In order for my daughter to get into the school’s gifted program, she had to take a mental acuity test. A sniper’s visual acuity has to be exceptional because he must be able to clearly see his targets. According to many people, smoking marijuana does not decrease your intellectual acuity.

All subjects had a visual acuity of 609 or better in both eyes. 8 2 Their goal is to "give you the highest visual acuity while providing an aesthetic appeal." 5 1 His mental acuity is always sharply honed and aids him in all that he endeavors.