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- Dictionarycrit·i·cal·i·ty/ˌkridəˈkalədē/
noun
- 1. crucial importance: "all the agencies understand the criticality of their IT systems to their operations"
- 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"
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