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English definition of “essential”

essential

adjective     /ɪˈsenʃəl/
NECESSARY B1 very important and necessary: Computers are an essential part of our lives. Fibre is essential for a healthy digestive system. [+ to do sth] It is essential to arrive early for the show. [+ (that)] It is absolutely essential that she gets this message.Essential or necessary
BASIC the most basic and important: There's one essential point I think you've forgotten.Important and essential thingsInformation and messages
(Definition of essential adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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