acu·i·ty \əˈkyüəd.ē, aˈ-, -ətē, -i\noun (-es) Etymology: Middle French acuité, alteration (influenced by Latin acutus sharp, pointed) of Old French agüeté, from agu sharp (from Latin acutus) + -eté -ity — more at acute : sharpness, acuteness : keenness of sense perception < acuity of hearing > or acuteness or perceptiveness of mind < Wordsworth's acuity is exercised on common objects — Herbert Read > — see visual acuity