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English definition of “critical”

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critical

adjective uk   /ˈkrɪt.ɪ.kəl/ us    /ˈkrɪt̬-/

critical adjective (NOT PLEASED)

B2 saying that someone or something is bad or wrong: a critical report The report is highly critical of safety standards at the factory.
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critical adjective (IMPORTANT)

B2 of the greatest importance to the way things might happen: The president's support is critical (to this project). a critical decision
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critical adjective (GIVING OPINIONS)

C2 giving opinions or judgments on books, plays, films, etc.: She has written a major critical appraisal/study of Saul Bellow's novels. His last film won/received critical acclaim (= was praised by film critics).
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critical adjective (SERIOUS)

B2 extremely serious or dangerous: Both drivers are critical/in a critical condition (= so badly hurt that they might die) after the 120 mph crash.
(Definition of critical from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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