Meaning

• A critical value, factor, etc.

• In breakdancing, a kind of airflare move in which the dancer hops from one hand to the other.

Meaning

• Inclined to find fault or criticize

  "A good teacher is fair but critical."

• Pertaining to, or indicating, a crisis or turning point.

  "This is a critical moment."

• Extremely important.

  "It's critical that you deliver this on time."

• Relating to criticism or careful analysis, such as literary or film criticism.

  "The movie was a critical success, but bombed at the box-office."

• Of a patient condition involving unstable vital signs and a prognosis that predicts the condition could worsen; or, a patient condition that requires urgent treatment in an intensive care or critical care medical facility.

  "The patient's condition is critical."

• Likely to go out of control if disturbed, that is, opposite of stable.

  "The political situation was so critical that the government declared the state of siege."

• Of the point (in temperature, reagent concentration etc.) where a nuclear or chemical reaction becomes self-sustaining.

  "The reaction was about to become critical."

• (physics) Of a temperature that is equal to the temperature of the critical point of a substance, i.e. the temperature above which the substance cannot be liquefied.