[f. prec.] Cut or carved so as to have material removed from beneath the surface. (Cf. prec. 2 b.)
1793. Smeaton, Edystone L., § 39. The hole was somewhat under-cut; so that, when the lead was poured in the whole together would make a sort of dovetail engraftment.
1853. Rock, Ch. of Fathers, III. I. 111. Their slight open skreen-work looks but a frame for the deeply undercut thin foliage roving every where about it.
a. 1878. Sir G. Scott, Lect. Archit. (1879), II. 187. They are most wonderfully carved, the leaves being so much undercut as in places to be quite detached.