Definition of borehole
: a hole bored or drilled in the earth: such asa : an exploratory wellb chiefly British : a small-diameter well drilled especially to obtain water
First Known Use of borehole
BOREHOLE Defined for English Language Learners
Definition of borehole for English Language Learners
; especially : a hole dug into the earth in order to find water or oil
Seen and Heard
What made you want to look up borehole? Please tell us where you read or heard it (including the quote, if possible).