Category:Underpinning

Un"der*pin`ning, n.

1. The act of one who underpins; the act of supporting by stones, Masonry, or the like.

2. (arch.) (a) that by which a building is underpinned; the material and Construction used for support, introduced beneath a wall already Constructed. (b) the foundation, esp. of a frame house. [local, u.s.]