Sharp at
the end; ending in a sharp point; pointed; -- opposed to blunt or
obtuse; as, an acute angle; an acute leaf.
Having nice discernment; perceiving or using
minute distinctions; penetrating; clever; shrewd; -- opposed to dull
or stupid; as, an acute observer; acute remarks, or
reasoning.
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.
High, or shrill, in respect to some other sound;
-- opposed to grave or low; as, an acute tone or
accent.
Attended with symptoms of some
degree of severity, and coming speedily to a crisis; -- opposed to
chronic; as, an acute disease.
In celebration of Noah Webster's Birthday (October 16, 2009), we have prepared an updated website. 
