Learn the meaning of essential as an adjective, noun, and adverb in English. Find out how to use essential to describe something that is necessary, basic, or important, and see synonyms, antonyms, and related words. Learn the meaning of essential as an adjective, noun, and in different contexts. Find synonyms, pronunciation, examples, and related words for essential. Explore the term 'essential,' its significance, definition, historical context, and use in the English language. Understand the different dimensions of what is considered essential and how it applies in various contexts. Essential means very basic or necessary. A good frying pan is one of a short list of kitchen essentials every cook must have. To prevent fires, it's essential to turn off appliances before leaving the house.