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1. Constituting or being part of the nature or essence of something; inherent: "In that era of general good will ... few Americans doubted the essential goodness of their society" (David Halberstam).
2. Fundamentally important or necessary: essential ingredients. See Synonyms at indispensable.
3. Medicine Of, relating to, or being a condition or a disease whose cause is unknown: essential hypertension.
4. Biochemistry Being a substance that is required for normal functioning but cannot be synthesized by the body and therefore must be included in the diet: essential amino acids.
1. Something fundamental.
2. Something necessary or indispensable.

es·sen′ti·al′i·ty (-shē-ăl′ĭ-tē), es·sen′tial·ness n.
es·sen′tial·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(əˌsɛn ʃiˈæl ɪ ti)

n., pl. -ties.
1. the quality of being essential; essential character.
2. an essential feature, element, or point.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.essentiality - basic importance
importance - the quality of being important and worthy of note; "the importance of a well-balanced diet"
vitalness - the quality of being essential to maintain life
indispensability, indispensableness, vitalness - the quality possessed by something that you cannot possibly do without
inessentiality - not of basic importance
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


A basic trait or set of traits that define and establish the character of something:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in classic literature ?
Without supposing the personal essentiality of the man, it is evident that a change of the chief magistrate, at the breaking out of a war, or at any similar crisis, for another, even of equal merit, would at all times be detrimental to the community, inasmuch as it would substitute inexperience to experience, and would tend to unhinge and set afloat the already settled train of the administration.
While discussing, very much at random, the essentiality of what we call Poetry, my principal purpose will be to cite for consideration, some few of those minor English or American poems which best suit my own taste, or which, upon my own fancy, have left the most definite impression.
Contenting myself with the certainty that Music, in its various modes of metre, rhythm, and rhyme, is of so vast a moment in Poetry as never to be wisely rejected -- is so vitally important an adjunct, that he is simply silly who declines its assistance, I will not now pause to maintain its absolute essentiality. It is in Music perhaps that the soul most nearly attains the great end for which, when inspired by the Poetic Sentiment, it struggles -- the creation of supernal Beauty.
Specific metrics will be important in each of the following measurement areas: community benefit, population health, stakeholder engagement, quality performance, IT effectiveness, resource strength and market essentiality. Some of the metrics for resource strength will include a focus on resource efficiency.
The competition will culminate with a new team of America's Road Team Captains, who then begin two-year terms sharing the industry's message of "safety, essentiality and sustainability with the motoring public, news media, business and community leaders, public officials and their fellow drivers across the nation," the company said.
Among their perspectives are ambivalences about poverty, what keeps poor people from using libraries, public access computers and their implications, general programs and specific services that help the poor, how the libraries should help the homeless, partnerships and collaborations that enrich library services to the poor, and poverty and library essentiality.
While admitting that even the shrinking LTL sector has excess capacity these days, Logue admits that it's a "pricing market." Still, he says he believes the essentiality of LTL will still win the day for many customers.
He thus makes his account of the essentiality of the ethical in economic theory available to an audience that may not be familiar with German Idealism.
Teacher induction is highlighted because of its essentiality in bridging the gap between teacher preparation and teacher retention.
He also discusses the ways that mission movements have changed history, getting excited about serving God, making the connection between private and public worship, choosing obedience over selfish endeavors, and the essentiality of walking with honest integrity.
Each chapter offers historical information on the specific nutrient, demonstrating its essentiality and functionality in plants; explains how appearance and composition of plants can be used to assess nutritional status; discus ses the value of soil tests for assessing nutritional status; and recommends fertilizers that can be applied to remedy nutritional deficiencies.
In recent years, given the many accomplishments and true mission essentiality of reservists, USNR referred to a second-tier warrior with the same experience and the same ability.