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Definition essential in British English

essential adjective

adjective
/ɪˈsenʃ(ə)l/

▪ characteristic, component, element, feature, ingredient, part, requirement

Example

In a large organization, good internal communication is essential.

Example

Light is absolutely essential for the healthy development of plants.

Example

He had acquired the skills essential to his later success in politics.

Example

It is essential that all equipment is properly maintained.

Example

If you want to make major changes, it is essential to involve your staff.

Example

Her articles are essential reading for anyone interested in the war.

Example

She has always played an essential part in the smooth running of the business.

Synonyms and related words
2

the essential features of something are its most basic and typical features

Example

the essential characteristics of Marxist political thought

Example

The essential difference between us is that I take life seriously.

Synonyms and related words
2.1

most basic and necessary

Example

essential services such as shops and buses

Example

food, fuel, and other essential supplies

Synonyms and related words
2.2

used about the substances that your body needs in order to stay healthy

Example

essential vitamins/minerals/nutrients

Synonyms and related words
Definition essential in British English