underpinning

noun

un·​der·​pin·​ning ˈən-dər-ˌpi-niŋ How to pronounce underpinning (audio)
Synonyms of underpinningnext
1
: the material and construction (such as a foundation) used for support of a structure
2
: something that serves as a foundation : basis, support
—often used in plural
the philosophical underpinnings of educational methods
3
: underwear
—usually used in plural
4
: a person's legs
—usually used in plural

Synonyms of underpinning

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Examples of underpinning in a Sentence

the underpinnings of the theory have recently been called into question the underpinnings of the bridge were seriously damaged in the collision
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The underpinnings of the state investment was selling premium seating at a higher price and attracting more concerts. — Kenneth R. Gosselin, Hartford Courant, 19 May 2026 His ambitious tasting menu has high-concept underpinnings, meditating on themes like the progression of the seasons. — Jim Dobson, Forbes.com, 25 June 2026 The two share mechanical underpinnings, including their powertrains and most fundamental off-road hardware. — ABC News, 22 Apr. 2026 Otherwise, the underpinnings are perfectly sorted. — Utkarsh Sood june 27, New Atlas, 27 June 2026 See All Example Sentences for underpinning

Word History

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of underpinning was in the 15th century

Rhymes for underpinning

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Browse Nearby Words

underpinner
underpinning
underpitch
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Cite this Entry

“Underpinning.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underpinning. Accessed 7 Jul. 2026.

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Kids Definition

underpinning

noun
un·​der·​pin·​ning ˈən-dər-ˌpin-iŋ How to pronounce underpinning (audio)
1
: the foundation used for support of a structure
2
: prop entry 1, support
3
: a person's legs
—usually used in plural

More from Merriam-Webster on underpinning

Nglish: Translation of underpinning for Spanish Speakers

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