Critical

adjective

1. inclined to criticize severely and unfavorably
2. see also self-critical
3. of great importance or necessity : essential, vital
4. being in or approaching a state of crisis
5. crucial, decisive
6. of sufficient size to sustain a particular result (such as a chain reaction)
7. sustaining a nuclear chain reaction
8. consisting of or involving criticism
9. of or relating to the judgment of critics
10. exercising or involving careful judgment or judicious evaluation
11. see also critical race theory, critical thinking
12. including variant readings and scholarly corrections
13. of, relating to, or being a turning point or specially important juncture
14. such as
15. being or relating to an illness or condition involving danger of death
16. see also critical care
17. relating to or being the stage of a disease at which an abrupt change for better or worse may be expected
18. relating to or being a state, measurement, or point at which a definite change occurs