adjective
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exceeding what is sufficient or required
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not necessary or relevant; uncalled-for
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obsolete extravagant in expenditure or oversupplied with possessions
Other Word Forms
Etymology
Origin of superfluous
First recorded in 1400–50; late Middle English, from Latin superfluus, from super- super- + flu- (stem of fluere “to flow”) + -us -ous
Explanation
When something is so unnecessary that it could easily be done away with, like a fifth wheel on a car or a fifth person on a double date, call it superfluous. Superfluous (soo-PER-floo-uhs) means "more than required." Use it when pointing out something that could be removed without detracting from the quality of something: "For a climb over a glacier, the very thickest shoes are absolutely necessary; beyond these, all else seems superfluous to me," wrote the adventurer Charles Stoddard in 1899. The word comes from Latin and literally means "overflowing": super ("over") + fluere ("to flow"). So you can think of a superfluous addition as flowing over the boundaries of what's needed.
Vocabulary lists containing superfluous
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Grade 11, List 1
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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.
What if the scans that are, by the official guidance, considered superfluous, could catch something?
From Slate ● Sep. 9, 2026
In the first half of 2026, the S&P 500 software industry group declined 19.6% on fears that the AI trade would make some of its offerings superfluous.
From MarketWatch ● Sep. 8, 2026
Total domination attacked this fragile construction at its root, making human beings superfluous and sweeping them into an ideological process whose terrible boast was, in her phrase, “everything is possible.”
From The Wall Street Journal ● Aug. 7, 2026
It’s the making of a perfect joke: totally superfluous and uniquely dumb.
From Salon ● Jul. 12, 2026
Ash couldn’t answer, because her grief and anger now seemed so superfluous in comparison to the perfection of this fairy woman, who took her hand to lead her into the dancing circle.
From "Ash" by Malinda Lo
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Get a wordDefinitions 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.
