from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any device used to widen something; especially a drill designed to produce a hole greater than its own diameter
from The Century Dictionary and Cyclopedia
- n. One who or that which widens; specifically, a form of boring-bit or drill so shaped as to form a hole of greater diameter than itself: same as broach, 12.
Sorry, no etymologies found.