criticalitynoun
uk/ˌkrɪt.ɪˈkæl.ə.ti//ˌkrɪt.ɪˈkæl.ə.t̬i/criticality noun (NUCLEAR REACTION)
[ C or U ] specialized physics a nuclear chain reaction that is able to continue by itself, or the conditions under which this happens:
A criticality can occur when too much radioactive material is placed together.
criticality noun (IMPORTANCE)
[ U ] the fact of being extremely important:
Without denying the criticality of this particular problem, there are also others that need to be considered.