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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 findings represent a theoretical challenge to standard cosmology rather than observational proof that dark energy is unnecessary.

From Science Daily ● Oct. 29, 2026

The government relied on a document known as a criminal information, which is typically filed when a grand jury appears to be unnecessary, such as when a guilty plea is anticipated.

From The Wall Street Journal ● Oct. 28, 2026

“Hoppers” “ ‘Toy Story 5’ was perfectly fine and completely unnecessary, unless you’re a Disney shareholder.

From Los Angeles Times ● Oct. 28, 2026

If a solid stock drops simply because the broader sector is swinging lower, panic selling can result in unnecessary losses.

From MarketWatch ● Oct. 27, 2026

It would have been an unnecessary burden for them to bear.

From "The Hiding Place" by Corrie ten Boom

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

On Thursday, August 5th, the Regiment sorrowfully packed up all unnecessaries and piled them in the regimental dump.

From The Tale of a Trooper by Clutha N. (Clutha Nantes) Mackenzie

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

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

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 Charles Neville Buck

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