Meaning of “borehole” in the English Dictionary

british dictionary

"borehole" in British English

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boreholenoun [ C ]

uk /ˈbɔː.həʊl/ us /ˈbɔːr.hoʊl/

a deep hole made in the ground when looking for oil, gas, or water:

We must sink a borehole so that people will have water.
They obtained information about the rock by drilling boreholes.

(Definition of “borehole” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)