Definition of "Drill" :
noun: (military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms
noun: systematic training by multiple repetitions
noun: similar to the mandrill but smaller and less brightly colored
noun: a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)
verb: train in the military, e.g., in the use of weapons
verb: undergo military training or do military exercises
verb: learn by repetition
"We drilled French verbs every day."
verb: teach by repetition
verb: make a hole, especially with a pointed power or hand tool
"Don't drill here, there's a gas pipe."