01 v. t. To lay stones, masonry, etc., under, as the sills of a building, on which it is to rest.
imp. & p. p.
Underpinned; p. pr. & vb. n.
Underpinning
-
1.
To lay stones, masonry, etc., under, as the sills of a building, on which it is to rest.
-
2.
To support by some solid foundation; to place something underneath for support.