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Synonyms

unnecessary

American  
[uhn-nes-uh-ser-ee] / ʌnˈnɛs əˌsɛr i /

adjective

  1. not necessary or essential; needless; unessential.


noun

  • unnecessaries
    plural
  1. unnecessaries, things that are not necessary or essential.

unnecessary British  
/ ʌnˈnɛsɪsərɪ, -ɪsrɪ /

adjective

  1. not necessary

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of unnecessary

First recorded in 1540–50; un- 1 + necessary

Explanation

Anything that is extra or not needed is unnecessary. Wearing long underwear in July is an unnecessary precaution against being cold. If you don't need something, it's unnecessary. You take an unnecessary risk if you get in the car and don't bother to fasten your seatbelt. Driving your car when you could ride a bike instead is an unnecessary use of gasoline. If you keep dropping you pen in class, your teacher might say, "That's unnecessary." Walking your dog with two leashes is definitely unnecessary. That's obvious, but lots of times it's hard to tell what's necessary and what's unnecessary.

Keep Reading on Vocabulary.com

Vocabulary lists containing unnecessary

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The government has been ramping up its investigations of improper care — such as leaving patients in unnecessary pain, signing people up without their consent or failing to properly screen and train employees.

From MarketWatch Aug. 5, 2026

“These are sensible, targeted reforms that remove unnecessary friction from the U.K. IPO process,” said Inigo Esteve, a capital markets partner at law firm White & Case.

From The Wall Street Journal Aug. 5, 2026

To be sure, Medicaid fraud, waste and abuse – such as providers billing Medicaid for services that are unnecessary or never rendered – are very real problems that cost taxpayers billions of dollars annually.

From Salon Aug. 5, 2026

Chamber of Commerce is urging an extension of TPS for Haitian nationals “to prevent significant disruption to America’s workforce and avoid an unnecessary humanitarian crisis.”

From Slate Aug. 4, 2026

He stayed there, exposed to the sun and the rain, as if the thongs were unnecessary, for a dominion superior to any visible bond kept him tied to the trunk of the chestnut tree.

From "One Hundred Years of Solitude" by Gabriel Garcia Marquez

There are some great songs on it, but they're smothered in unnecessaries that made it really cloudy.

From The Guardian May 23, 2013

She has the air of somebody who has reached a point in her life where she is dispensing with the unnecessaries.

From Time Magazine Archive

Boroskie, thou art a Knave; it contains nothing But rubbish from the other rooms and unnecessaries: Will't please you see a strange Clock?

From Beaumont & Fletcher's Works (3 of 10): The Loyal Subject by Beaumont, Francis

No mission chest piously outfitted at home ever carried to the remote heathen a more useless assortment of unnecessaries than this one brought to me.

From The Portal of Dreams by Buck, Charles Neville

We also had enough unnecessaries to bring us to grief in a couple of weeks.

From Tracks of a Rolling Stone by Coke, Henry J. (Henry John)

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