Bedeutung von “essential” — Learner’s Dictionary

essential

adjective us uk /ɪˈsenʃəl/
A balanced diet is essential for healthy growth.Trust is an essential ingredient in a successful marriage.Computers are an essential tool for modern scientists.Good communication skills are absolutely essential for this job.It is essential to book rooms in advance.
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.
BASIC

the most basic and important:

There's one essential point I think you've forgotten.

(Definition von “essential” aus dem Cambridge Learner's Dictionary © Cambridge University Press)