The meaning of UNDERPIN is support, substantiate. How to use underpin in a sentence.

Backing, supporting & defending (Definition of underpin from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

UNDERPIN definition: to prop up or support from below; strengthen, as by reinforcing a foundation. See examples of underpin used in a sentence.

Definition of underpin verb from the Oxford Advanced Learner's Dictionary. underpin something (formal) to support or form the basis of an argument, a claim, etc. The report is underpinned by …

Nov 29, 2025 · underpin (third-person singular simple present underpins, present participle underpinning, simple past and past participle underpinned) (transitive) To support from below …

underpin meaning, definition, what is underpin: to give strength or support to something...: Learn more.

1. (Building) to support from beneath, esp by a prop, while avoiding damaging or weakening the superstructure: to underpin a wall.

"Underpin" roots back to the Old English "pin," which meant a peg or a nail. The imagery of something pinned from beneath evolved to signify giving support from below, illustrating its …

To underpin is to justify or support the ideas behind something, the way your extensive research underpins your self-published book on ice cream trucks in the United States. Whenever you …

to support from beneath, esp by a prop, while avoiding damaging or weakening the superstructure to underpin a wall