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Meaning of critical

crit•i•cal

Pronunciation: (krit'i-kul), [key]
— adj.
  1. inclined to find fault or to judge with severity, often too readily.
  2. occupied with or skilled in criticism.
  3. involving skillful judgment as to truth, merit, etc.; judicial: a critical analysis.
  4. of or pertaining to critics or criticism: critical essays.
  5. providing textual variants, proposed emendations, etc.: a critical edition of Chaucer.
  6. pertaining to or of the nature of a crisis: a critical shortage of food.
  7. of decisive importance with respect to the outcome; crucial: a critical moment.
  8. of essential importance; indispensable: a critical ingredient.
  9. (of a patient's condition) having unstable and abnormal vital signs and other unfavorable indicators, as loss of appetite, poor mobility, or unconsciousness.
    1. pertaining to a state, value, or quantity at which one or more properties of a substance or system undergo a change.
    2. (of fissionable material) having enough mass to sustain a chain reaction.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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