ak-ūt′, adj. sharp-pointed: keen: opp. of dull: shrewd: shrill: critical.—adv. Acute′ly.—n. Acute′ness.—Acute angle, an angle less than a right angle (see Angle); Acute disease, one coming to a violent crisis, as opp. to Chronic. [L. acutus, pa.p. of acuĕre, to sharpen, from root ak, sharp.]