noun
a hole or passage made by a drill; usually made for exploratory purposes
• Topics: ↑mining, ↑excavation
• Hypernyms: ↑excavation
• Hyponyms: ↑shot hole
* * *
drill hole,
an exploratory hole made by a drill in probing for mineral, gas, or oil deposits: »
The heavy trading was touched off by reports of a rich drill hole in a copper vein (Time).
Useful english dictionary. 2012.