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bore. 1  A hole or passage made by or as if by use of a drill. 2  A hollow, usually cylindrical chamber or barrel, as of a firearm. 3  The interior diameter of a hole, tube, or cylinder. 4  The caliber of a firearm. 5  A drilling tool.
Not straying far from its Latin root terra meaning earth, terrestrial means of the earth.. If it's terrestrial, you'll find it on earth. If it's extraterrestrial, you'll find it emerging from a UFO. The adjective terrestrial can also be used to describe something that lives on land (as opposed to living in water, for example). On their trip to the rain forest, the scientists were charged with cataloging terrestrial animals. Another group was going to be in charge of cataloging the aquatic animals..