1. An implement with cutting edges or a pointed end for boring holes in hard materials, usually by a rotating abrasion or repeated blows; a bit: "The carpenter used an electric drill to make holes in the wood so he could insert bolts to hold the structure together."
2. An exercise done to practice military skills or procedures: "During basic training, the military recruits spent hours every day doing one drill after another one as they were led by their sergeants."
3. A physical or mental activity that is done repeatedly in order to learn something, to become more skillful, etc.: "Sheena's students do a vocabulary drill every Monday and Wednesday to prepare them for the tests that will be given on the following Fridays."

1. To make a hole in something with a drill: "Blaine had to drill a hole in the back of the cabinet and place a bolt in it so it wouldn't fall apart."
2. To teach or to train people by repeating a lesson or exercise again and again: "The teachers wanted to drill the children on their multiplication tables at least three times a week."

"The commander gave orders to drill the troops by having them practice the specified military procedures and exercises until they got them right."