The Collaborative International Dictionary of English v.0.48:
bore-hole \bore-hole\ n. (mining) a hole or passage made by a drill, especially one made for exploratory purposes. Syn: bore, drill hole. [WordNet 1.5]WordNet (r) 3.0 (2006):
bore-hole n 1: a hole or passage made by a drill; usually made for exploratory purposes [syn: bore, bore-hole, drill hole]