Meaning of “vital” in the English Dictionary

"vital" in British English

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vitaladjective

uk /ˈvaɪ.təl/ us /ˈvaɪ.t̬əl/
vitally
adverb uk /ˈvaɪ.təl.i/ us /ˈvaɪ.t̬əl.i/

C2

It's not vitally important that we get extra funding for the project, but it would help.

(Definition of “vital” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"vital" in American English

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vitaladjective

us /ˈvɑɪ·t̬əl/

necessary or extremely important for the success or continued existence of something:

The existence of a strong opposition is vital to a healthy democracy.
The kidneys play a vital role/part in removing waste from the blood.
[ + that clause ] It’s vital that you respond at once.
vitally
adverb us /ˈvɑɪ·t̬əl·i/

It’s vitally important that we get there by tomorrow.

(Definition of “vital” from the Cambridge Academic Content Dictionary © Cambridge University Press)