unnecessary
Americanadjective
noun
adjective
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of unnecessary
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.
Vocabulary lists containing unnecessary
List 3
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List 9
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"New Michigan Graduation Requirements Shortchange Many Students"
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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.
Prosecutors allege the scheme resulted in nearly $27.7 million in fraudulent Medicare claims for medically unnecessary hospice services, with Medicare paying about $26.9 million.
From The Wall Street Journal • Jun. 23, 2026
Or, more specifically, an unnecessary amount of bread.
From Salon • Jun. 22, 2026
The Rams are canceling minicamp and ending their offseason program early, but Sean McVay isn’t the first NFL coach to find minicamp unnecessary.
From Los Angeles Times • Jun. 22, 2026
We’ve found that wellness really boils down to six behaviors: having social relationships, staying sharp mentally, avoiding unnecessary risks, getting good sleep, exercising, and, yes, eating well.
From MarketWatch • Jun. 21, 2026
He had always meant to do something, and Amy’s advice was quite unnecessary.
From "Little Women" by Louisa May Alcott
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
