|1.||containing or making severe or negative judgments|
|2.||containing careful or analytical evaluations: a critical dissertation|
|3.||of or involving a critic or criticism|
|4.||of or forming a crisis; crucial; decisive: a critical operation|
|5.||urgently needed: critical medical supplies|
|6.||informal so seriously injured or ill as to be in danger of dying|
|7.||physics of, denoting, or concerned with a state in which the properties of a system undergo an abrupt change: a critical temperature|
|8.||go critical (of a nuclear power station or reactor) to reach a state in which a nuclear-fission chain reaction becomes self-sustaining|
critical crit·i·cal (krĭt'ĭ-kəl)
Of or relating to a medical crisis.
Being or relating to a grave physical condition especially of a patient.
Of or relating to the value of a measurement, such as temperature, at which an abrupt change in a chemical of physical quality, property, or state occurs.