a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)

make a hole, especially with a pointed power or hand tool

a rock drill having cruciform cutting edges; used in mining

a steel rock drill with a star-shaped point that is used for making holes in stones or masonry; it is operated by hitting the end with a hammer while rotating it between blows

a rock drill with flutes that are straight