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English definition of “vital”

vital

adjective (IMPORTANT)    /ˈvaɪ.təl/ US  /-t̬əl/
B2 necessary for the success or continued existence of something; extremely important : A strong opposition is vital to a healthy democracy . She had found out some information of vital importance . The kidney plays a vital role / part in the removal of waste products from the blood . [+ that] It's absolutely vital that you do exactly as I say. [+ to infinitive] It is vital to get medical supplies to the area as soon as possible .Very important or urgent vitally     /-i/ adverb C2 It's not vitally important that we get extra funding for the project , but it would help .Very important or urgent
(Definition of vital adjective (IMPORTANT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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