Definition of criticality in English:

criticality

Pronunciation /ˌkridəˈkalədē/ /ˌkrɪdəˈkælədi/

noun

  • 1Crucial importance.

    ‘all the agencies understand the criticality of their IT systems to their operations’
    • ‘science underscores the criticality of a child's earliest years to better health in adulthood’
  • 2(of a nuclear reactor or fuel) the quality or state of maintaining a self-sustaining chain reaction.

    • ‘reactor 4 at the Oi nuclear power plant reached criticality on Thursday morning’