acute ,
adj :
Brief, quick, short. High or shrill. Intense, sensitive, sharp. Urgent. (botany) With the sides meeting directly to form an acute angle (at an apex or base). (geometry) Of an angle: less than 90 degrees. (geometry) Of a triangle: having all three interior angles measuring less than 90 degrees. (linguistics, chiefly historical) Of an accent or tone: generally higher than others. (medicine) Of an abnormal condition of recent or sudden onset, in contrast to delayed onset; this sense does not imply severity, unlike the common usage. (medicine) Of a short-lived condition, in contrast to a chronic condition; this sense also does not imply severity. (orthography) After a letter of the alphabet: having an acute accent.
