- present participle of underpin.
underpinning
Americannoun
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a system of supports beneath a wall or the like.
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Often underpinnings. a foundation or basis.
to uncover the emotional underpinnings of an illness.
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Informal. underpinnings,
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underwear, especially women's underwear.
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the legs.
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noun
Etymology
Origin of underpinning
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.
That is the same theory underpinning the controversial airstrikes since September on alleged drug traffickers' boats in the Caribbean and the Pacific.
From Barron's • May 29, 2026
Also underpinning the RBA’s decision to tighten policy further were signs the economy remains fundamentally strong despite growing shocks.
From The Wall Street Journal • May 19, 2026
The business logic underpinning all of it is a subscription model that distinguishes the Times sharply from traditional game companies.
From Barron's • May 16, 2026
His pace and dribbling quality have always been best in class - underpinning a unique profile in the modern game.
From BBC • May 16, 2026
The thesis is misnamed, because, as it is usually formulated, Duhem did not hold it and Quine abandoned it, but it is the fundamental conceptual underpinning of much modern history and philosophy of science.
From "The Invention of Science" by David Wootton
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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.