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Meaning of “essential” - Learner’s Dictionary

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 from the Cambridge Learner’s Dictionary © Cambridge University Press)
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More Learner's Dictionary definitions for “essential”

Avoiding common errors with the word enough.
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by Liz Walter Enough is a very common word, but it is easy to make mistakes with it. You need to be careful about its position in a sentence, and the prepositions or verb patterns that come after it. I’ll start with the position of enough in the sentence. When we use it with a noun,

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