Main entry: acute
Definition: having or experiencing a rapid onset and short but severe course
Usage: acute appendicitis; the acute phase of the illness; acute patients
Antonyms: chronic
Definition: being long-lasting and recurrent or characterized by long suffering
Main entry: acute
Definition: of an angle; less than 90 degrees
Antonyms: obtuse
Definition: of an angle; between 90 and 180 degrees
Main entry: acute, intense
Definition: extremely sharp or intense
Usage: acute pain; felt acute annoyance; intense itching and burning
Antonyms: dull
Definition: not having a sharp edge or point
Antonyms: dull
Definition: not keenly felt
Antonyms: natural
Definition: (of a musical note) being neither raised nor lowered by one chromatic semitone
Antonyms: flat
Definition: (of a musical note) lowered in pitch by one chromatic semitone
Main entry: acute
Definition: of critical importance and consequence
Usage: an acute (or critical) lack of research funds
Antonyms: uncritical
Definition: not critical; not tending to find or call attention to errors
Antonyms: noncritical, uncritical
Definition: marked by disregard for critical standards or procedures
Antonyms: noncritical, noncrucial
Definition: not in a state of crisis or emergency
Antonyms: noncritical
Definition: not critical; not at a point of abrupt change
Main entry: sharp, needlelike, acuate, acute
Definition: ending in a sharp point
Main entry: penetrating, penetrative, incisive, discriminating, piercing, acute, keen, knifelike, sharp
Definition: having or demonstrating ability to recognize or draw fine distinctions
Usage: an acute observer of politics and politicians; incisive comments; icy knifelike reasoning; as sharp and incisive as the stroke of a fang; penetrating insight; frequent penetrative observations
Antonyms: unperceiving, unperceptive
Definition: lacking perception