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Definition of underpinning

underpinning

/ˌʌn.dɚˈpɪn.ɪŋ/
un · der · pin · ning
Plural:underpinnings
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underpinning Lexical Profile

underpinning Game Scores & Validity

• noun

1

A set of ideas, motives, or devices that justify or form the basis for something (often used in the plural).

Example

"The professor's lecture explored the philosophical underpinnings of modern constitutional law."

2

A solid structure or material introduced beneath a wall or building to strengthen and support its foundation, or the process of installing such support.

Example

"The historic cathedral required extensive underpinning to prevent its stone walls from subsiding into the soft clay."

Synonyms
View all synonyms for underpinning

• Rhymes for underpinning

• Nearby Words

underperformance
underperformer
underpin
underpinning
underplay
underpopulated
underpopulation

Word Origin & Etymology

Derived in the 16th century from the verb 'underpin', combining the Old English prefix 'under-' (beneath) with 'pin' (to fasten or prop up with pegs or masonry).

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Underpinning. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/underpinning
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