DictionarycriticalCrucial or dangerous
adjective

critical

Extremely important or involving serious danger.

Clean drinking water is critical to the health of this community.

Etymology

The Greek adjective concerns judgment. Critical developed the idea of a decisive point requiring judgment, then described situations of crucial importance or serious danger.

More examples

  • The next few hours are critical for the rescue effort.
  • She remains in critical condition after the accident.
  • A critical shortage of nurses forces the hospital to postpone surgeries.

Forms

critical · more critical · most critical

critically adverb — In an extremely important or dangerously serious way.

Similar words

crucial
Stresses decisive importance rather than danger or medical severity.
serious
Signals substantial concern without necessarily suggesting immediate danger.
vital
Emphasizes something essential for survival, success, or continued functioning.