essential

American  

[uh-sen-shuhl] / əˈsɛn ʃəl /

adjective

1. 

   absolutely necessary; indispensable.

   Discipline is essential in an army.

   Synonyms:

   vital, intrinsic, inherent, basic, fundamental

2. pertaining to or constituting the essence of a thing.

   Antonyms:

   accidental, extrinsic, extraneous, incidental

3. noting or containing an essence of a plant, drug, etc.

4. being such by its very nature or in the highest sense; natural; spontaneous.

   essential happiness.

5. Mathematics.

   1. (of a singularity of a function of a complex variable) noting that the Laurent series at the point has an infinite number of terms with negative powers.

   2. (of a discontinuity) noting that the function is discontinuous and has no limit at the point.

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noun

• essentials
  plural

1. a basic, indispensable, or necessary element; chief point.

   Concentrate on essentials rather than details.

essential British  

/ ɪˈsɛnʃəl /

adjective

1. vitally important; absolutely necessary

2. basic; fundamental

   the essential feature

3. completely realized; absolute; perfect

   essential beauty

4. biochem (of an amino acid or a fatty acid) necessary for the normal growth of an organism but not synthesized by the organism and therefore required in the diet

5. derived from or relating to an extract of a plant, drug, etc

   an essential oil

6. logic (of a property) guaranteed by the identity of the subject; necessary. Thus, if having the atomic number 79 is an essential property of gold, nothing can be gold unless it has that atomic number

7. music denoting or relating to a note that belongs to the fundamental harmony of a chord or piece

8. pathol (of a disease) having no obvious external cause

   essential hypertension

9. geology (of a mineral constituent of a rock) necessary for defining the classification of a rock. Its absence alters the rock's name and classification

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noun

1. something fundamental or indispensable

   a sharp eye is an essential for a printer

2. music an essential note

Synonym Usage

See necessary. Essential, inherent, intrinsic refer to that which is in the natural composition of a thing. Essential suggests that which is in the very essence or constitution of a thing: Oxygen and hydrogen are essential in water. Inherent means inborn or fixed from the beginning as a permanent quality or constituent of a thing: properties inherent in iron. Intrinsic implies belonging to the nature of a thing itself, and comprised within it, without regard to external considerations or accidentally added properties: the intrinsic value of diamonds.

Other Word Forms

Derived Forms

• essentiality
  noun
• essentialness
  noun
• preessential
  noun
• subessentialness
  noun
• quasi-essential
  adjective
• subessential
  adjective
• essentially
  adverb
• preessentially
  adverb
• quasi-essentially
  adverb
• subessentially
  adverb

Inflected Forms

Nouns

• essentials
  plural

Etymology

Origin of essential

First recorded in 1300–50; Middle English essencial, from Late Latin essentiālis. See essence, -al ¹

Explanation

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. The adjective essential is often followed by to or that: It is essential to wash your hands. It is essential that you dry them after. This adjective is from Middle English essencial, from Late Latin essentialis, from Latin essentia "the basic nature of a thing, its essence" plus the Latin suffix -alis "relating to."

Example Sentences

See Examples For:

essential essentials

Understanding when and how this material is lost matters because gas is essential for forming giant planets such as Jupiter and Saturn.

From Science Daily ● Sep. 28, 2026

Coss, treating travel as an essential ingredient in her creative life.

From Salon ● Sep. 27, 2026

Roughly a third of L.A. voters rank “moving homeless people indoors” and “crime and public safety” as top priorities, respectively; just slightly less say “fixing streets, sidewalks, streetlights and other city infrastructure” is essential.

From Los Angeles Times ● Sep. 27, 2026

Almost 250 people died, while vineyards, orange groves and plots used to grow Albufera rice, an essential paella ingredient, were decimated.

From Barron's ● Sep. 26, 2026

Military leaders warned that it was essential to be strong and prepared, as a warning to any aggressor.

From "The War to End All Wars: World War I" by Russell Freedman

Adobe expects online shopping to hit record levels this holiday season, as consumers chase deals earlier and stock up on essentials.

From The Wall Street Journal ● Sep. 28, 2026

The company also expects consumers to stock up on essentials during holiday deals, projecting online sales of personal hygiene products will more than double-and clothing basics will more than triple-during Cyber Week.

From The Wall Street Journal ● Sep. 28, 2026

Some stores had empty shelves over the weekend as residents raced to buy essentials, while fresh produce at market stalls was kept dry in polystyrene foam boxes or hanging just above the water level.

From Barron's ● Sep. 27, 2026

Rebecca McManamon, a consultant dietitian, lists the following essentials:

From BBC ● Sep. 20, 2026

Shoving away the queasy feeling that’s creeping into my gut, I slip my weekend essentials into my backpack along with my Moleskine sketchbook, my drawing pencils, and my chemistry textbook.

From "Red Flags and Butterflies" by Sheryl Azzam

Related Words

• condition
• element
• essence
• fundamental
• must
• precondition
• prerequisite
• principle
• requirement
• requisite