<p><strong>Adjective</strong></p><ul><li>Sharp or severe in effect; intense: acute sorrow; an acute pain.</li><li>Extremely great or serious; crucial; critical: an acute shortage of oil.</li><li>(Of disease) brief and severe (as opposed to chronic).</li><li>Sharp or penetrating in intellect, insight, or perception: an acute observer.</li><li>Extremely sensitive even to slight details or impressions: acute eyesight.</li><li>Sharp at the end; ending in a point.</li><li>(Of an angle) less than 90°.</li><li>(Of a triangle) containing only acute angles.</li><li>Phonetics, Orthography: consisting of, indicated by, or bearing the diacritic ´, placed over vowel symbols in some languages to show that the vowels or the syllables they are in are pronounced in a certain way.</li></ul><p><strong>Noun</strong></p><ul><li>Phonetics, Orthography: the acute accent.</li></ul>