- present participle of wane.
waning
Americanadjective
-
decreasing in strength, intensity, etc..
Many teens in focus groups expressed waning enthusiasm for social media.
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declining in power, importance, prosperity, etc..
The recent hacking of the retailer’s credit card system will have devastating implications for its already waning business.
-
drawing to a close; approaching an end.
The bill will likely be passed in the waning days of this legislative session.
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(of the moon) decreasing in the extent of its illuminated portion after the full moon.
The crescent of fine white sand, wrapped around the bay, looked like a waning moon.
noun
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the process of decreasing, declining, or coming to an end.
The Middle Ages occurred between the waning of the Roman Empire and the beginning of the Renaissance.
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(of the moon) the process of decreasing in the extent of its illuminated portion after the full moon.
Onion seeds are planted in the fall, during the waning of the Harvest Moon.
Other Word Forms
Etymology
Origin of waning
First recorded before 900; wan(e) ( def. ) + -ing 2 ( def. ) for the adjective senses; wan(e) ( def. ) + -ing 1 ( def. ) for the noun senses
Explanation
If the moon was full, and now it's getting slimmer each night, it's a waning moon: it's getting gradually smaller. Waning can be used for anything that diminishes, like the brightness of the sunlight in the late afternoon, your interest in cartoons, or your influence over your teenage daughter's fashion choices. It comes from the Old English verb wǫnian, which means "to lessen."
Vocabulary lists containing waning
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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.
Those with a business masters still have a leg up on their peers without one, but their job prospects and salaries are waning.
From The Wall Street Journal • Jul. 1, 2026
Reading scores among high school seniors are at their lowest in decades, according to federal testing data, while schools across the country are grappling with how to respond to waning attention spans and artificial intelligence.
From Los Angeles Times • Jul. 1, 2026
Talk of America’s waning financial and economic hegemony has been greatly exaggerated.
From MarketWatch • Jun. 28, 2026
However, that euphoria appears to be waning of late, with company valuations looking stretched and traders questioning when firms will see a return on the trillions that has been invested.
From Barron's • Jun. 26, 2026
His red long-sleeved robe shimmered in the waning sun.
From "Half of a Yellow Sun" by Chimamanda Ngozi Adichie
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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.