Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To cut away or mine out the lower portion of a coal-seam or a part of the underelay so as to win or get the overlying coal.

from The Century Dictionary and Cyclopedia

  • To cut away or mine out the lower portion of a coal-seam or a part of the underclay so as to win or get the overlying coal. [Penn. anthracite region.] In various parts of England to jad, hole, undercut, kirve, and bench. See jad, n. and verb

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From under- +‎ hole.

Examples

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