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Definition of acute:

  1. Attended with symptoms of some degree of severity, and coming speedily to a crisis; - opposed to chronic; as, an acute disease.
  2. Having nice discernment; perceiving or using minute distinctions; penetrating; clever; shrewd; - opposed to dull or stupid; as, an acute observer; acute remarks, or reasoning.
  3. Having nice or quick sensibility; susceptible to slight impressions; acting keenly on the senses; sharp; keen; intense; as, a man of acute eyesight, hearing, or feeling; acute pain or pleasure.
  4. High, or shrill, in respect to some other sound; - opposed to grave or low; as, an acute tone or accent.
  5. Sharp at the end; ending in a sharp point; pointed; - opposed to blunt or obtuse; as, an acute angle; an acute leaf.
  6. To give an acute sound to; as, he acutes his rising inflection too much.

Synonyms:

precipitous, pointed, subacute, lancinate, autoimmune, fearful, critical, sharp-worded, clear-sighted, blistering, congenital, shrieky, perspicacious, urgent, vicious, shrewd, important, high, keen, fine, sharp, acuate, subtile, acuminate, judicious, angry, sense, desperate, perceive, clinical, dandy, furious, exigent, dire, climacteric, ghastly, cunning, bang-up, observant, fierce, cracking, astute, chronic, dire, catching, necessitous, sensitive, bully, quick, safety, intensive, probing, great, dreadful, piercing, communicable, terrible, exquisite, awful, crucial, frightful, assault, bad, penetrating, dieresis, deep, incisive, extreme, slap-up, chills and fever, asymptomatic, explosive, discriminating, compelling, perception, umlaut, agonising, emergent, cedilla, delicate, cuspated, cuspate, decisive, achy, crying, vital, chapped, imperative, circumflex, intense, serious, hellacious, distinguish, pressing, hard, intelligent, dangerous, violent, mucronate, cuspidate, accent, tilde, smashing, diacritic, discerning, importunate, crucial, assail, sensitive, aciculated, desperate, piping, crafty, heavy, acute accent, vehement, corking, big, subtle, not bad, trenchant, drastic, fearsome, profound, careful, burning, clamant, heavy-duty, knifelike, peachy, clever, crippling, sagacious, ague, neat, vivid, instant, sensation, shrilly, shooting, penetrative, kinaesthetic, benign, perceptive, needlelike, almighty, groovy, knowing, imperious, ferocious, aciculate, advanced, nifty, cuspidated, swell, grave, acicular, lancinating.

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