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Brief, quick, short.
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High or shrill.
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Intense; sensitive; sharp.
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Urgent.
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(botany) With the sides meeting directly to form an acute angle (at an apex or base).
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(geometry, of an angle) Less than 90 degrees.
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(geometry, of a triangle) Having all three interior angles measuring less than 90 degrees.
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(linguistics, chiefly historical) Of an accent or tone: generally higher than others.
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(phonology, dated, of a sound) Sharp, produced in the front of the mouth. (See Grave and acute on Wikipedia.Wikipedia)
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(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.
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(medicine) Of a short-lived condition, in contrast to a chronic condition; this sense also does not imply severity.
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(orthography, postpositive) Of a letter of the alphabet, having an acute accent.