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English definition of “acuity”

acuity

noun [U] uk   /əˈkjuː.ə.ti/ us    /-ə.t̬i/ formal
the ability to hear, see, or think accurately and clearly: Tiredness also affects visual acuity. He was a man of great political acuity.IntelligencePerceptive
(Definition of acuity from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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