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Definitely vs Essential - What's the difference?

definitely | essential |

As an adverb definitely

is without question and beyond doubt.

As an adjective essential is

necessary.

As a noun essential is

a necessary ingredient.

definitely

English

Adverb

(en adverb)
  • Without question and beyond doubt.
    • The mother definitely has love for her child.
  • In a definite manner; decisively.
  • * Nikolai Gogol, The Nose (in translation)
    • And the Nose definitely turned away.

    essential

    English

    Adjective

    (en adjective)
  • Necessary.
  • Very important; of high importance.
  • * {{quote-magazine, date=2013-05-17
    • , author=George Monbiot, authorlink=George Monbiot , title=Money just makes the rich suffer , volume=188, issue=23, page=19 , magazine=(The Guardian Weekly) citation , passage=In order to grant the rich these pleasures, the social contract is reconfigured. The welfare state is dismantled. Essential public services are cut so that the rich may pay less tax. […]}}
  • Being in the basic form; showing its essence.
    • Don’t mind him being grumpy. That’s the essential Fred.
  • Really existing; existent.
  • * Webster (1623)
    • Is it true, that thou art but a name, / And no essential thing?
  • Such that each complementary region is irreducible, the boundary of each complementary region is incompressible by disks and monogons in the complementary region, and no leaf is a sphere or a torus bounding a solid torus in the manifold.
  • (medicine) Idiopathic.

    • Synonyms

    * indispensable, crucial, substantive * See also

    Antonyms

    * inessential, unessential, accidental, nonessential, unneeded, adscititious, unimportant, accessorial, unnecessary, incidental

    Derived terms

    * essential amino acid * essential fatty acid * essential listening * essential nutrient * essential oil * essentially * essentialness * quintessential

    Noun

    (en noun)
  • A necessary ingredient.
  • A fundamental ingredient.

    • Related terms

    * essence ----