- a hole drilled in the earth, as for the purpose of extracting a core, releasing gas, oil, water, etc.
Origin of borehole
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for borehole
This of course cannot be seen in a borehole or very small section.Notes on the Fenland
T. McKenny Huges
The borehole is charged with the explosive to be fired, and the temperature is regulated by means of the steam pipe.
A small charge of high explosives is then pushed up to the end of the borehole and fired.
- a hole driven into the ground to obtain geological information, release water, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012