- (n.) The foundation, especially of a frame house.
- (n.) That by which a building is underpinned; the material and construction used for support, introduced beneath a wall already constructed.
- (n.) The act of one who underpins; the act of supporting by stones, masonry or the like.
- (p.pr.&vb.n.) of Underpin.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). underpinning. Retrieved September 20, 2026, from http://smartdefine.org/underpinning/definitions/2076737 |
| Chicago | Webster's. 2011. "underpinning" http://smartdefine.org/underpinning/definitions/2076737 (accessed September 20, 2026). |
| Harvard | Webster's 2011, underpinning, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/underpinning/definitions/2076737>. |
| MLA | Webster's. "underpinning" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/underpinning/definitions/2076737> |